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Post by donkeychomp on May 4, 2018 20:41:01 GMT 1
Yes I might! There will be a lot of head scratching on this one for sure...
Alex
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Post by donkeychomp on May 10, 2018 21:38:11 GMT 1
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Post by JonW on May 10, 2018 23:45:13 GMT 1
To be honest the derestricted 50s and the big bore (65 Autissa in UK, but 70, 90 and 125 in Europe ) were fast, bordering on frightening, with the OEM brakes... so pleased to see that's not going to be a hassle here with the new front end. Im glad you said youre going with a 2T, its right for the bike and I dont think you'll fit many larger 4T engines in this frame, ie XT500 is really tall... and heavy! Exciting good value build, I like it
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Post by donkeychomp on May 11, 2018 10:05:54 GMT 1
Thanks Jon. I think the idea (in embryo) was a good one and if the front end fits as easily as I think the rear will this could be a viable bike to build. Hopefully she'll be on the road before the end of summer. I still think 80cc might not be enough oomph but it will be a good base to start. Maybe add a slighty larger engine later on, YB or RS100 springs to mind. Plus there is the scope for some mild tuning...hehe
Alex
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Post by donkeychomp on May 13, 2018 0:21:09 GMT 1
After yet more advice from Tony from the A/C forum, (keep it up my friend) I have found and ordered some purple metallic paint. The manky sprocket bolts simply tapped out. Kinda wondering why an engineer and myself sat and looked at that wheel for about 5 minutes staring at the bolts without thinking of simply turning the wheel around. DOH! The NOS sprocket is wrong (no surprises) but the eBay seller is really good. Replied to my message and says he has found the right one. I am impressed. So that will go on the to be restored wheels and sold on to fund the build. Picking up a bottom part of an RD50 engine on Monday from someone on here (you know who you are lol) so that's great news. But...I want more oomph so some bigger barrels will need to be sourced and a BIG carb lol. Wondering what would bolt straight on..RD80 yes...maybe a YB100? RS100? Also bought some restored Mito forks today, new seals etc with pics to prove it and under £100, pretty good for USD forks I think and they are Marzocchis too! Now on the hunt for yokes and clip ons to get a rolling chassis, found what I think I want but awaiting replies to some queries. With a fair wind and a bit of luck this bike should be on her own two feet in a week...or three www.aircooledrdclub.com/smf/index.php?action=dlattach;topic=56733.0;attach=79537;imagewww.aircooledrdclub.com/smf/index.php?action=dlattach;topic=56733.0;attach=79539;imagewww.aircooledrdclub.com/smf/index.php?action=dlattach;topic=56733.0;attach=79541;imageAlso looking for a tank and seat. Saw a rusty RD50LC one and had a small bid but it won't suit the bike really. Some joker has a coffin style correct tank but it's rustier than a 80's Lada and he wants fifty notes for it. Sod that. Seats are in abundance though. Go my eye on a cafe racer style one from China, just need to check the measurements! Yokes are out there too but some sellers never mention what model they are from, found some I think are the correct 40mm ones but need an answer from the seller. Clip ons will come from China as they are bonkers cheap and the company I have used in the past makes quality stuff. Then it's the niggly little parts to find/beg for/make. I've promised myself a bike for this summer and this baby is the cheapest option. The LC would cost maybe another 3 grand to get on the road, the TZR more. This will be a total build for maybe under a thousand. Hope springs eternal etc! Alex
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Post by donkeychomp on May 14, 2018 19:12:30 GMT 1
Took a jaunt over to Mark's place today, was great to finally meet you mate. The bikes he has...well, all I will say it was like going back to a 1980's Yamaha show room. And seeing the triple in the flesh. Hot damn!
But I digress lol. Picked up a DT50 (same as RD) bottom end that seems in very good nick. I'll take it apart asap and see what's what. The plan is to get a big bore kit for it and try to find some articles on tuning that little engine.
Alex
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Post by yamark on May 14, 2018 20:25:15 GMT 1
Took a jaunt over to Mark's place today, was great to finally meet you mate. The bikes he has...well, all I will say it was like going back to a 1980's Yamaha show room. And seeing the triple in the flesh. Hot damn! But I digress lol. Picked up a DT50 (same as RD) bottom end that seems in very good nick. I'll take it apart asap and see what's what. The plan is to get a big bore kit for it and try to find some articles on tuning that little engine. Alex Hi Alex, great to meet you today mate. The bottom end you picked up has an engine number - 2L8. That means it is from an RD50M (approx. 1979). The complete engine I have is a 2M9 - DT50 from the same year.
Good luck with the project.
Cheers, Mark
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Post by donkeychomp on May 14, 2018 20:45:39 GMT 1
It just gets better and better lol. Nice to know it is an RD lump. I'll be adding some pics soon, been a bit busy recently! Alex ps why did I expect to see Barry Sheene when I rang the doorell...
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Post by JonW on May 15, 2018 1:13:08 GMT 1
Cool its coming along! Check out the Dutch scooter (brommer) sites for upgrades, we used to go mental on our 50s over there as we were stuck with mopeds until we were 18 unlike the uk. Some examples (use Chrome as its translates automatically): www.opvoeren.nl/merk/yamaha/dt50/cilinderswww.vanseggeren.nl/tuning.asp?Merk=dtmx&Soort=cil#.WvolPtOFPdQyou can get OEM 80cc of course, but Im sure you could find 90 and above back in the 80s for these, maybe 2nd hand (2dehands.nl maybe?) over there? We certainly had all sorts on the Honda MT/MBs we had
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Post by midlifecrisisrd on May 15, 2018 8:26:21 GMT 1
Only just found this and love it
I had a dt80mx as my first bike and although faster than a 50 it soon got boring
However the addition of the 100cc bore kit made a massive difference
Don't know the difference between 50 and 80 bottom end but may be possible
Steve
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Post by donkeychomp on May 15, 2018 19:29:01 GMT 1
Thanks MLC it's going to be err, different lol.
Jon that is some great info. I thought 60cc was the max but a 70cc would be way better. I am going to order that, thing is what head do I use? The standard 50 one?
Alex
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Post by midlifecrisisrd on May 15, 2018 19:32:13 GMT 1
Think you just use the standard head
My 80 to 100cc was basically just a barrel, piston kit, a main jet and a 1 tooth smaller front sprocket to correct it once it would rev it's nuts off
The squish must have been interesting lol
Steve
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Post by madmick on May 15, 2018 20:57:56 GMT 1
Hi donkeychomp, Really interesting this as I had a rd50 1981 in black..... my first real bike. I had tonnes of stuff done to it back then including a 65cc bore kit, with the original head being used. The carb used, was one from a KH250. The exhaust was a modified micron, I think with a shortened header pipe. It was fast, 72 mph, with the correct sprocket. I’ll keep reading with excitement 😁
M.M.
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Post by donkeychomp on May 15, 2018 21:15:43 GMT 1
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Post by JonW on May 17, 2018 3:52:16 GMT 1
They used to sell heads to match the big bores as well, but you could have a standard one redone to fit etc. I have run a standard head on a big bore, but check the compression as it could be too much.
One thing, what ever big bore you buy, get extra top end gasksts when you buy it. You never know with stuff like this if they will keep making them. When I had the MT5 with 70cc kit I bought a bunch to last the life of the bike etc. get a spare piston or rings too. You might later be able to get those parts from other bikes, but its much simpler to have it already.
I think there might be some diffs between the 50 and 80 bottom end, but there isnt always. I know some brands also had one less gear on the smaller models, dunno about the Yams tho... I was all honda and Suzuki back then... Yam was the stuff we dreamed of but couldnt afford so I ride my mates newer and nicer bikes and wished, but nothing came true :/
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Post by JonW on May 17, 2018 3:57:22 GMT 1
Oh and for carbs... for a 65-80 I would use what the OEM 80 used, not the one from the 50 if its different as they were often restricted. With honda that was something like a 16 instead of the 12 on the 50. Fitting something like a 20 would work, but it;d be too big really. the dutch and sweedish sites should also be able to sell manifolds, reeds, pipes etc for these as well. if not new, then used etc
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Post by midlifecrisisrd on May 17, 2018 8:54:49 GMT 1
As Jon says buy an extra head gasket and rings
I did a good few thousand miles on my 100 and it had "went off" a little so i ordered rings to refresh it
Took that long I'd traded it for an rxs before they arrived
80 carbs plentiful on German ebay
Steve
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Post by donkeychomp on May 17, 2018 21:09:50 GMT 1
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Post by donkeychomp on May 18, 2018 22:57:27 GMT 1
Great news! This engineering place does pretty much anything. They got the shock off and straightened my cars door hinges in moments, total cost a tenner. They can do the wheel so I left that with them. When it's done I'm bringing the frame and swinger and ask them to fit it. Seems simple enough, shave a tad off the swing arm and relocate the shock mount on the frame.
Alex
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Post by bezzer on May 19, 2018 18:16:50 GMT 1
Great news! This engineering place does pretty much anything. They got the shock off and straightened my cars door hinges in moments, total cost a tenner. They can do the wheel so I left that with them. When it's done I'm bringing the frame and swinger and ask them to fit it. Seems simple enough, shave a tad off the swing arm and relocate the shock mount on the frame. Alex Great to hear you have a helpful small engineering firm you can use Alex, that’s worth it’s weight in gold. All of the small firms near me have either closed or aren’t interested in doing ‘one offs’. I live in a town that has a huge engineering heritage, but sadly can’t even get wheel spindle spacers turned nowadays ☹️. Treasure your engineering firm mate, they’re a dying breed.
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Post by donkeychomp on May 19, 2018 21:09:31 GMT 1
They are really good, doing lots of large stuff too. All modern equipment but the bloke I use likes to get his hands dirty! I do value them.
Alex
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Post by donkeychomp on May 20, 2018 1:25:45 GMT 1
Weird how a bad situation can turn into one's advantage. I ordered a Mito 125 yoke off e bloody Bay for £30 the other day after assurances it is for 50m forks, nope they are for 35mm ones so not even Mito ones as they are either 50mm or 38mm, what a dork why do people on eBay do this? So I email him, 3 times with no reply, ended up having to go through eBay to return it and get my money back. So I look again and the only option is to buy a complete fork and yoke assembly for nudging 200 notes. Dammit. Had a think and typed in 50mm yokes...first thing that showed was Aprilia RS50 ones. A fiver for the bottom yoke and showing the size quite clearly. So an entire yoke unit is about £15 for the Aprilia and the slimmer section that slots into the headstock may well fit the RD. Going to get one.
Alex
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Post by dusty350 on May 20, 2018 6:33:08 GMT 1
Hi mate Those Rg125f yokes I have are 50mm top and bottom too - just to give you more options Dusty
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Post by ypvs400 on May 20, 2018 9:20:02 GMT 1
I have a mint pair of Aprirlia rs50 right way up forks fitted with new alloy clip ons if you are interested plus a pair of wheels with a new front disc.
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Post by donkeychomp on May 20, 2018 10:18:15 GMT 1
Thanks lads, getting no joy with eBay sellers. Ask 'are these yokes for 50mm forks' and they either don't bother replying or answer incorrectly. I only need some yokes, I have the forks and wheel already, but will now hunt for some RG125F yokes instead!
Alex
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Post by donkeychomp on May 22, 2018 21:04:15 GMT 1
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Post by donkeychomp on May 31, 2018 1:02:37 GMT 1
OK then. The front wheel should be ready for collection tomorrow (today) and I have ordered some clip ons and a brake and clutch lever set. Was going to get a purple set to complement the tank but after more closer examination the RD50 had silver levers and I want to replicate the look as much as possible. As some of you might know my gf is back in England (finally!) and has been selling some stuff for me on eBay to help fund the cause. What a gal lol. Made a tidy £100 tonight and most of that gone already. The Mito swing arm seems to accept the RD shock but I have a feeling with the linkage removed it's going to be way to short so when it's been machined to fit the RD frame I will have a measure up and see what's what. The yokes are also an issue but I now have a front wheel spindle so I can see what may or may not fit!
Then there's the top end. No idea what those Dutch lads are up to but the phone just rings and rings...might have to opt for the 60cc kit from here and some violent porting lol.
Will post some pics tomorrow.
Alex
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Post by donkeychomp on Jun 1, 2018 20:24:46 GMT 1
I went to pic up my repaired front wheel today, a first class job on it too, and took the frame and Mito swinger along. Sadly the bloke I use wasn't in so I got the 'Mr Expensive' chap to look it over. He said it's doable but would run into hundreds of pounds to do it! Unless I cut down the swing arm myself then cut it in half (seriously) and he would weld it back together. So for the time being and to have a rolling chassis I'll use the RD swinger!
Alex
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Post by donkeychomp on Jun 2, 2018 21:28:35 GMT 1
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Post by donkeychomp on Jun 16, 2018 21:19:41 GMT 1
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