drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Oct 23, 2012 22:29:59 GMT 1
Do the pistons on those not go in the wrong way round ? I.E the arrow pointing to the back of the motor No, the pistons go in the right way round. It's the barrels that go on the wrong way round. Had to think twice when putting the circlip on the piston, especially as I put the pistons in the barrels first! ;D
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Post by mikee on Oct 23, 2012 22:32:39 GMT 1
Good job it's not a leap year , mind you the clocks are going back soon :-)
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drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Oct 24, 2012 8:10:08 GMT 1
Good job it's not a leap year , mind you the clocks are going back soon :-) That's a good point. Mine are KM/h clocks, does that mean they have to go back more than the MP/h ones ;D ;D
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justyr
Thrash Merchant
Posts: 331
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Post by justyr on Oct 26, 2012 8:38:02 GMT 1
Great story and pics Simon, keep 'em coming. JR
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drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Oct 26, 2012 11:32:59 GMT 1
Great story and pics Simon, keep 'em coming. JR Just for you JR! Hi Guys (and galls) Bit of an update, went and put the head on the bike, then, even though I have no real ability to kneel, bend or climb stairs without crutches I decided to lift the engine off the bench and put it in the bike on my own. I was so full of painkillers that I didn't really feel any problems at the time, I simply put all the tools I needed on the floor eased myself down, got comfortable (?!?) and got on with it! So, know you all like photos so here's some for ya! Head on and torqued: In but not tight: One exhaust on: Thought I'd treat it to one of these as the last owner didn't put one in..... Getting there now: Shop gave me the wrong plugs so couldn't finish the front and get the rad on: Got a pic of the broken fairing bit, gutted about this but at least its secure now the EXUP mirrors are on: So that was it. I lifted the bike at the back to move it to one side and back felt like someone had stabbed me with a cold knife and had to retire to the house. I couldn't even bend down to to lock the door, had to wait for the missus to come home. She wasn't impressed! I've just had another couple of days laid in bed unable to move, but now I feel better so it's time to get outside and get busy before the cold weather comes! today I'm to try and find the missing exhaust gasket and hopefully (if I do find it, I should have the rear complete and *might* even fire it up! Laterz (as the young people say) Simon
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drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Oct 26, 2012 18:30:41 GMT 1
My word, two updates in the same day!!!! Right! Been outside most of the day getting the rest of the little jobs done like making it run. Put the battery on, PV's working fine, adjusted them up as they were a smidge out, wound the oil pump back as well as previous lad had really over-oiled it, the mark was about 5mm past its line-up point, must have smoked like a 14 year-old French kid. No wonder it's Marboro colours! So, first of all, found the exhaust washer and fitted the other pipe: Sorted the wiring out so it's nowhere near the exhausts and fitted the plastic cover: It was a bit neater than that afterwards! Popped on the rad: And after about 200 kicks it struggled into life: Hmm, I think ticking over at 5,000's going to be a bit of a bind... Due to my back, I really couldn't get down that low and strip the carbs. I assumed (?!?) the blow-up was recent. Then I noticed the tax ran out in June this year..... Off with the carbs, which, should be easy as they're at the front under the rad, but oh no, the air trumpet passes behind the top hose so you have to drain the water.... Anyway, back on the slab, it doesn't look like coolant's been going round the preheaters for quite a few summers.... Then, I remembered over on the TZR forum, someone having a fueling problem and finding out there's some tiny tiny gauze filters in the carb inlet tubes. One of my tubes had never been off and had to resort to heavy-handed shenanigans... Mine were the same as the other guys: Even though they're caked up in crap they still fit in my bin! So made some new fuel lines: Main jets are 250 on both sides, that was without an airfilter in and the trumpets in the airbox top removed. Tops of pistons were black so I'll take that as good, as it's probably running a bit richer now the Yam filter's in. As it was getting dark in the garage, you'll have to believe me when I looped the l/h carb water pipe onto the r/h carbs port on the thermostat housing. Just long enough to curve around the plug like it was meant for it. So, back on and it does this now: So, now it's had two good heat-cycles now, I've a couple of small issues; the carbs are deffo not balanced, the right one is not pulling its weight, even though the airbox is still off (obviously buggering the mixture up) after 15 mins of running the l/h pipe is too hot to touch where the side panel would be yet the r/h one is significantly cooler. I think an adjust with the long screwy coming on, or just drop them off and use the 6mm drill method as I find that really accurate. Ahh, come back LC's with the little window and separate screws! R/h pipe smokes like a bugger as well, whether its residue from the blow-up and an over-rich oil pump and carb imbalance I don't know yet. Other jobs are find out the mixture setting. The l/h one is only half a turn out, which doesn't sound enough to me but these have electrinic air valves and I know bugger all about carbs Started putting the bodywork back on the rear, although I'll give it another heat cycle tomorrow and another Sunday then I can re-torque the head and go for a spin! More later. Simon
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drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Oct 27, 2012 15:33:14 GMT 1
well, been out in the garage again this morning (well, 12.00) as didn't fancy laying on the floor when our lass had to scrape solid ice off the car at 7.30 thins morning, I thought I'd let the day thaw out first. So, as I was saying about the drill technique. It's the way I do it, some might say its wrong, some might say its right but I'm doing it wrong, some might say nothing, some might try it themselves and think its great, some might try it themselves and think its crap. I don't care. I like it and it works for me. Right, turn your throttle cable adjusting screw until it opens the slides. Get a *mm drill (depending how far the adjuster opens the slides really) For me this time it was a 4mm, a little small but its all I've got Find out which carb actuates from the throttle spindle. Adjust the cable adjuster until its a nice fit with resistance (like if you was adjusting tappets on a proper engine) Now, put it in the same place on the other carb and adjust using the screw handily placed somewhere even Jeremy Beadles hand couldn't get. Adjust until perfect or back gives out... De-riguer blurry photo All good now, Done the 3rd heat cycle, 1 more tomorrow, cool down, torque head and the air trunking goes on, rad put back and bodywork on ;D Thanks for looking Simon
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drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Oct 30, 2012 16:04:13 GMT 1
Managed to get out today and have a spin on the street. Hmmmmmmmmm Very lumpy at the bottom end and won't rev past 6,000. Actually revved up better without the airbox on, it sounds like it's coked up but even trying to get it to rev on the stand it refuses to hit the sweet spot and rev round to the red!?! And it is still smoking like a mad thing... PV seems to be working... Plugs? (I've put br8es in for running in) Ignition? Any other ideas? Simon
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drzsimon
Weekend rider
Back after a long break
Posts: 90
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Post by drzsimon on Nov 4, 2012 13:07:26 GMT 1
UPDATE! Been out for a spin this morning, it's good news and it's bad news.... Good news: It's still weak off throttle and (in 1st & 2nd) crappy until it gets to 7,000, then it's off like a scolded cat. Obviously, I'm throttling back but it's very responsive. Also chucking a good lump of two-stroke out of the exhausts but normal when "on the pipe." I think the four 15-20 minute heat cycles on tick-over have filled the cases and pipes. BAD NEWS: It's a fricking killer on my back. I cannot believe how bl***y uncomfortable this thing is, certainly not for a six-footer. I've been less than a mile and my sciatic never is rubbed up the wrong way again. This also means I cant get the fairing panels back on I'm really pissed about this cos it's a fun little screamer, more akin to a 250LC than a 350 powervalve though, which is exactly the opposite of what I was lead to believe So, it's with deep regret its got to go in the "for sale" section I'm selling it for what it cost me plus the cost of the motor rebuild, which I think is more than fair. I didn't build it to sell it, I was expecting to keep it after all, hence doing all the work properly, but also due to the fact I am now on the UB40 as well it really needs to go to a good home. It's more money on Gumtree and will be even more on that online auction site. But I'll put it across the forums I use first so it can go to a enthusiast rather than a sniper. Thanks for reading, wish it had a happier ending Simon
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Post by copper99 on Nov 4, 2012 17:31:14 GMT 1
Interesting read Simon!
I guess they earnt the "reverse seizure" moniker for more than one reason,pistons and backs(?), shame you have to sell when you've cracked the worst of it, good luck with the sale.
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Post by fatty on Nov 4, 2012 17:40:37 GMT 1
Mikejeff take a look at the top pics.... carbs front, exhausts rear, they need to point to the back as barels on that way.
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Post by flames on Nov 4, 2012 18:20:46 GMT 1
sorry to hear she has to go dude,speshly after all the hard work and effort you have put in to get her sorted.hope yr back gets better soon and hopefully you wont have to get rid.
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Post by markhoopy on Dec 5, 2012 23:32:36 GMT 1
I bought the 3MA from Simon last month and am now waiting for one or two warm days to get some miles on it before tackling the carbs and seized air screw. Credit to Simon for the work he carried out on the engine - all running sweetly and it should be at least another 12000 miles before it goes bang again Attachments:
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Post by markhoopy on Dec 5, 2012 23:33:48 GMT 1
Attachments:
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