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Post by lolly on Jan 15, 2020 10:46:59 GMT 1
Whats the worst garden shed tuning you have ever done ?
i will start the ball rolling ; back in 1979 i tried to make my fizzer go a bit quicker so i i got my file out and started to "port" the exhaust port (didnt bother to take the barrel off) i then took the same file to the rotary disc valve ; strangely enough the bike wouldnt start after my butchery ; luckily enough there was an abundance of second hand spares in the area .
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Post by veg on Jan 15, 2020 11:12:06 GMT 1
Either my mate Suzuki x1 50, micron spannie took barrel off filed it fitted a bigger carb that was too big for the manifold used tape to seal it didn’t run went back to std carb started it blew it up. Dad had a zzr1100 and a dtr 125 for commuting I was working at Jand S accessories in brum at the time he lent me the Yamaha as my bike was off the road. I derestricted it by opening the power valve, blew it up on the way to work (holes a piston) had to push it home about 5 miles. Then I had to rebuild it before he got back from work he was a teacher. Got a new standard piston etc didn’t get the barrel honed didn’t have time, re fitted it etc he never knew at the time. Told him years later and he just laughed. Funnily enough I am the same age today as he was then. Happy days.
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rickymac
Drag-strip hero
Hi all new to this forum and owner of a barn find 250lc
Posts: 224
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Post by rickymac on Jan 15, 2020 11:41:12 GMT 1
When I was 13 me and my mate went halves on a Honda C70 bog seat field bike, the down pipe had rotted away, his mum calls him in for dinner and leaves me outside I then clock his Raleigh racer and think them handlebars look like they’ll be good for a down pipe, I then cut them up shoved it in the head then hose clipped it to the ready of the exhaust, mate came out after his beans on toast and said that’s quiet what have you done, never mind I said just wait till you cycle to school tomorrow 🤣🤣
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Post by rigga on Jan 15, 2020 14:22:03 GMT 1
I was working at Jand S accessories in brum at the time On the Cov road before it moved to town? Used to be in there a lot.
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Post by veg on Jan 15, 2020 14:32:24 GMT 1
That’s the one, i had worked at Nck and frettons Honda then J&S I was the only non brummie, yam yam in there after rob the old manager left to set up Newbury.
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Post by rigga on Jan 15, 2020 15:04:25 GMT 1
NCK, explains how you know Dom then, Frettons Honda, there's a name I've not heard in a long time
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Post by veg on Jan 15, 2020 17:20:23 GMT 1
I was at nck Dom was at nck power but yes that’s how I know him and through a family member that I now have nowt to do with, who is also well known (infamous) in tvr circles hence why trying to speak to jammy dodger. 👍
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Post by steve h on Jan 15, 2020 17:26:19 GMT 1
Not mine but a mates fizz. He had it tuned by "someone who knew what to do". It had the jet widened by twisting something into it.. mothballs in the pet tank, cazzy R premix... it lasted a week before blow up without being anywhere close to being as fast as mine.
Mine.. I tuned my 250LC which enabled me to pass 6 bikes on Aintree's straight (on one lap) in my second meeting to finish 5th in the heat and 10th in the final. Went really well, not difficult to do , just followed the Mechanics guide and used Harpowa reeds.
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Post by liffy16 on Jan 15, 2020 21:25:23 GMT 1
Nice one Steve the owd railway straight at Aintree used to gear her up for that 😀👍
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Post by steve h on Jan 15, 2020 23:00:09 GMT 1
Nice one Steve the owd railway straight at Aintree used to gear her up for that 😀👍 Its sad that the club has had problems there... big loss. I'm out of touch these days so don't really know what happened...
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Post by donkeychomp on Jan 16, 2020 0:26:09 GMT 1
Aged 16. Honda SS50 with a 70cc head and barrel. Found a disc braked front end from the Graveyard in Twickenham and thought that would improve the last second outbrake the mate on his Fizzy manoueuvre. Fitted it all. Thought a quick spin up the road and back. No lid on. Off I went, the throttle decided it wanted to be on fully, I grabbed a fistful of front brake and nothing happened...by then I was a few feet from a dead end, front wheel hit the kerb and I flew over the handlebars head first into a brick wall. Massive gash in my head, claret everywhere. Abandoned bike and stumbled home with my vision impaired by the blood flow.
Happy days.
Alex
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Post by hudtm60 on Jan 16, 2020 1:25:35 GMT 1
Well that explains a lot. Just kidding! I was also one of those saddled with a barely pull the skin off a rice pudding SS50 and curious- did the 70cc ‘kit’ ever work?
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Post by cbm on Jan 16, 2020 5:51:29 GMT 1
My Brother had an SS50 which was his first legal bike on the road in 1974. I put an 70cc top end & carb on it for him and knocked the baffle/restricter out of the carb to head manifold that they all came with in the UK. He loved that thing especially after the mods as it kept up with his mates Fizzy's & Garelli's etc. no problem.
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Post by hudtm60 on Jan 16, 2020 6:01:46 GMT 1
Damn- I never knew about that restrictor- was it a 5 speed? Those seemed fast.
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Post by shell2tx on Jan 16, 2020 22:01:01 GMT 1
Dunno about tuning but I restricted my mtx125 took about 2.5hrs with a grinding stone on my dads black decker drill anyway hed to my mate who raced a cr125 he takes a go on a disused warehouse site that had a hill/embankment he flys up comes down says just go up it give it a little bit at the bottom, I hit the embankment about 40 he said the bike hit the hill and didn't touch the ground till the top about 40 ft,i then realise there is 10 ft of grass and 10ft oh tarmack then a rough cast wall I landed on the tarmack and went straight into the wall I can still remember my heels hitting the wall just below the guttering I wasn't laughing long when I seen my front wheel bent like an S. John
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Post by donkeychomp on Jan 16, 2020 23:42:34 GMT 1
For a 16 year old it was fast as f**ky (50mph+). Pissed over any FS1-E but the handling was woeful, hence the desire for a better brake!
Alex
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Post by arrow on Jan 17, 2020 8:20:15 GMT 1
Came off my first 250 (a Kawasaki KH) and while I was off work with the injuries feeling sorry for myself I bought my mates old fizzy to play around with. I took God knows how much off the head with a rasp then flatted it off pretty well. Got files into the ports and proceeded full on. First time out it went pretty quick for about 50 yards, just before it ripped all the barrel studs out of the crankcase!
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Dave B
Drag-strip hero
Posts: 240
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Post by Dave B on Jan 17, 2020 10:45:32 GMT 1
A friend of mine was competing in the Manx Scooter Week in the early 70's. He was asuccessful rider in scooter events, but after the first day, he wrecked the cylinder. We had a spare sent over from Liverpool, but it was bog standard. After a lot of begging and wheedling, we got access to a car workshop at Quarter Bridge. I had a couple of grinding points, and one of those huge electric drills with a handle on the end. I did what I could in the way of porting, though it was quite strenuous, working with the drill resting on my shoulder. The drill must have weighed about 14kg! After putting the bike together, (A Lambretta GT200) Nick did the 200 mile event, and came back and said,"I can recommend your porting. It's never gone so well!". If you are wondering, I did know quite a lot about two strokes even then- though I did not know half as much as I thought I did! www.amazon.com/Two-Stroke-Motorcycle-Engine-Maintenance-Repair/dp/1785001205
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Post by scooter on Jan 17, 2020 21:59:24 GMT 1
good book dave read from cover to cover
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Post by liffy16 on Jan 18, 2020 11:43:18 GMT 1
Nice one Steve the owd railway straight at Aintree used to gear her up for that 😀👍 Its sad that the club has had problems there... big loss. I'm out of touch these days so don't really know what happened... Think I heard that Dave who ran the club for years has finished and usual problems With noise few clubs gone now new era for example but I too am out of touch with the club scene
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Post by darboots on Jan 22, 2020 17:27:39 GMT 1
1982, I had my first road bike, a spanking new DT50MX. I used to go to schoolboy MX meetings and loved the small of Castrol R, so draine the 2-T tank, and topped up with Castrol R. All went fine for a few days, then the poor little MX started to slow down and stall. It would restart after 5-10 minutes of kicking. Only later on did I realise the Castrol R was gumming up the piston rings...
1983, the DT50MX went in PX for a new DT125LC. About a year later, I had it derestricted and ported by Piston Broke Engineering in Bristol (I think he's still there!!). The bike went like stink in the first 5 gears, but really struggled to maintain speed in sixth due to bogging down. It's only recently occured to me that I would've needed to re-jet the carb!
I'd love those two bikes back, but neither seemed to have made it past 4 years old according to the DVLA tax info...
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Post by shell2tx on Jan 24, 2020 23:09:15 GMT 1
Best tuning mod i ever did to a DT125LC was an RD125LC front sprocket ha ha got 87mph out of it thru the Clyde tunnel in Glesga.
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Post by bigkenx on Jan 25, 2020 16:30:00 GMT 1
Ar 50 with a 93 aultisa big bore on it went well fitted a 80 carb and head I went my biker cousins to show off and while I was inside they held the throttle open full chat with mole grips and when I bumped it it flipped and the foot peg went in my calf muscle how I laughed still have the scar they found it hilarious
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Post by markhoopy on Jan 25, 2020 17:43:43 GMT 1
For a 16 year old it was fast as f**ky (50mph+). Pissed over any FS1-E but the handling was woeful, hence the desire for a better brake! Alex I had a 4 speed SS50 - MWT106P - and fitted a C70 barrel/piston and C65 head, which apparently had slightly higher compression than the C70 head. It was certainly fast but only until the engine warmed up because the oil pump drive gear had somehow lost all its teeth and was just a wheel that wasn't driven by the camchain as it should have been. After a hundred or so extremely high-temperature heat cycles the cam melted and the piston and exhaust valve met, fell hopelessly in love, then gave each other a good hammering. I stripped the engine and found the reason why it always ran hot enough to give my shins sunburn whenever I went anywhere on the bike. Rather than find a second-hand SS50 engine I invested in one from a C90, unaware that the engine mounts were wider than the SS50 frame or that the whole electrical system was completely different. I hacksawed an inch of the engine mounts off the crankcases and bodged the wires to get a spark, not realising at the time that the two charging systems weren't compatible, that I was now running a total-loss system, or that the C90 engine needed charge in the battery for it to run. I had fitted a 16 tooth front sprocket - standard SS50 was 14, C90 15 - and on the A64 to Tadcaster on the first proper ride with the C90 engine the needle went round past 60mph on the clock. Once the battery went flat near Boston Spa it took me three hours to push it back home. I saved up and bought a KTM Comet Cross .. as fast as any 50 my friends owned at the time, and reliable too. XL100 forks and wheels were fitted to the SS50/90 and it became a field bike that needed the battery charging once a week.
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Post by markhoopy on Jan 25, 2020 17:53:06 GMT 1
Nothing to do with tuning or garden sheds either but way back when we had pushbikes my brother got a spanking new Coventry Eagle racer for Christmas. Both brakes squealed loudly whenever he used them so I suggested wiping a bit of 3-in-1 oil around the rims of his wheels. Ten minutes later off he sets for a test ride with the freshly-oiled rims. How the car missed him when he got to the roundabout at the bottom of our street is anyones guess, and it was around that time that he stopped asking me for advice.
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Post by tony2stroke on Jan 25, 2020 20:48:18 GMT 1
Ar 50 with a 93 aultisa big bore on it went well fitted a 80 carb and head I went my biker cousins to show off and while I was inside they held the throttle open full chat with mole grips and when I bumped it it flipped and the foot peg went in my calf muscle how I laughed still have the scar they found it hilarious Funny! that just reminded me about a little sabotage we used to do to each other, remove spark plug cap and put a little piece of fag butt in and replace it, I watched my mate kick his bike over and bump it up and down the road for ages before he realised, it started out just taking cap off and putting it back on loosely so you sometimes it started but sometimes not and if it did when you went over bumps it would cut out, we all agreed not to do it anymore in the end as it was getting silly and the 1st thing you did if bike didn't start after 2 kicks was check your spark plug cap or any other fault for that matter, the 1st place to look was your spark plug cap, just in case 1 of your mates had taken it off, AH those were the days.
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Post by bigkenx on Jan 25, 2020 21:10:09 GMT 1
Without going off topic these are the t**ts why I got into the hoarding state I’m in now as they all had a iconic bike between them also with their mates lc’s gamma 5’s gpz, zeds cbx1000 gsx’s etc it didn’t stop there I like that with the fag butt wish I’d of done that , if you had a Haynes manual they would stamp on it to christen it , rip your keys out at the lights and throw them , hit your run stop while tank down racing , they also made me the try something first man which one was to ride a bog ped off a Sherpa flat bed at forty which ended up me being thrown vertical to the handle bars and having the worst tank slapper in the world bar Trevor nation on the Norton , which brings me on topic to the bog ped we put the engine in a ar50 frame with kx 125 forks and sculpted a hoover pipe exhaust threw the frame it’s was our trails bike ha ha
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Post by tony2stroke on Jan 25, 2020 22:36:19 GMT 1
Without going off topic these are the t**ts why I got into the hoarding state I’m in now as they all had a iconic bike between them also with their mates lc’s gamma 5’s gpz, zeds cbx1000 gsx’s etc it didn’t stop there I like that with the fag butt wish I’d of done that , if you had a Haynes manual they would stamp on it to christen it , rip your keys out at the lights and throw them , hit your run stop while tank down racing , they also made me the try something first man which one was to ride a bog ped off a Sherpa flat bed at forty which ended up me being thrown vertical to the handle bars and having the worst tank slapper in the world bar Trevor nation on the Norton , which brings me on topic to the bog ped we put the engine in a ar50 frame with kx 125 forks and sculpted a hoover pipe exhaust threw the frame it’s was our trails bike ha ha Brilliant! I think we all must of done the same, I remember all the above myself mate, all good stuff
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Post by donkeychomp on Jan 25, 2020 23:36:41 GMT 1
For a 16 year old it was fast as f**ky (50mph+). Pissed over any FS1-E but the handling was woeful, hence the desire for a better brake! Alex I had a 4 speed SS50 - MWT106P - and fitted a C70 barrel/piston and C65 head, which apparently had slightly higher compression than the C70 head. It was certainly fast but only until the engine warmed up because the oil pump drive gear had somehow lost all its teeth and was just a wheel that wasn't driven by the camchain as it should have been. After a hundred or so extremely high-temperature heat cycles the cam melted and the piston and exhaust valve met, fell hopelessly in love, then gave each other a good hammering. I stripped the engine and found the reason why it always ran hot enough to give my shins sunburn whenever I went anywhere on the bike. Rather than find a second-hand SS50 engine I invested in one from a C90, unaware that the engine mounts were wider than the SS50 frame or that the whole electrical system was completely different. I hacksawed an inch of the engine mounts off the crankcases and bodged the wires to get a spark, not realising at the time that the two charging systems weren't compatible, that I was now running a total-loss system, or that the C90 engine needed charge in the battery for it to run. I had fitted a 16 tooth front sprocket - standard SS50 was 14, C90 15 - and on the A64 to Tadcaster on the first proper ride with the C90 engine the needle went round past 60mph on the clock. Once the battery went flat near Boston Spa it took me three hours to push it back home. I saved up and bought a KTM Comet Cross .. as fast as any 50 my friends owned at the time, and reliable too. XL100 forks and wheels were fitted to the SS50/90 and it became a field bike that needed the battery charging once a week. That was so funny! Alex
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Post by jon on Jan 26, 2020 10:21:23 GMT 1
Ar 50 with a 93 aultisa big bore on it went well fitted a 80 carb and head I went my biker cousins to show off and while I was inside they held the throttle open full chat with mole grips and when I bumped it it flipped and the foot peg went in my calf muscle how I laughed still have the scar they found it hilarious Funny! that just reminded me about a little sabotage we used to do to each other, remove spark plug cap and put a little piece of fag butt in and replace it, I watched my mate kick his bike over and bump it up and down the road for ages before he realised, it started out just taking cap off and putting it back on loosely so you sometimes it started but sometimes not and if it did when you went over bumps it would cut out, we all agreed not to do it anymore in the end as it was getting silly and the 1st thing you did if bike didn't start after 2 kicks was check your spark plug cap or any other fault for that matter, the 1st place to look was your spark plug cap, just in case 1 of your mates had taken it off, AH those were the days. I’d forgotten all about that until you reminded me LOL. Me an my mates you to do exactly the same on scooters. There was a rubber boot covering 3 or so wires going into the CDI. I can’t remember clearly which colour (maybe green) went to the ignition switch. Simply unplug this wire and the boot back on was game 2 after people became wise of the plug cap. In fact that reminds me of another hilarious joke. When people came round to visit me at my parents house they’d just see the scooters and knew we’d be in the garage so they just let themselves in. I’d hear a scooter coming and quickly whip of the cap to expose the HT lead. Another mate would hold this against the metal garage door and as soon as we heard some touch the handle I would kick the scooter over and send a shock to them. Ah memory lane. Jon
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