crankcase

I had thought a dt100 kickstart mech would work but from what I see online where some vendors state a shaft length they don’t appear to be longer and some are stated as shorter?! But maybe the inner crankcase has a different casting. If I could get accurate measurements for these alternative shafts (DT/rt10o and twin shock dt175 then this could be a good solution for ty case replacements

thanks, I can find some but I need to know the lengths of these alternative shafts. Need one about 9mm longer.

Fitted a DT100 case but find the TY kickstart splines dont protrude through enough and that I can pull the kickstart shaft out by 10mm, I could space that out with a teflon spacer but does anyone know if the RT or DT100 (or early dt175 twin shock) kickstart shaft is longer than the standard TY shaft? Or do these models have different crankcases that positions the kickstart shaft further out with the correct clearance to the clutch case? Has anyone successfully extended a kickstart shaft by cutting, welding in a new section? Looks like the kickstart shaft would have to be about 10mm longer than std TY175 to use these older cases. Thanks

Hi folks I am part way through a process of registering a Yamaha TY175, I've sent in the V62 with fees, and some follow up photos and bike description after an email from DVLA. Four months later.....I've received a V55/5 form from DVLA that is for first tax and vehicle reg (Im guessing they could not find any original number) This form assumes you are a likely a dealer and that you have a certificate of conformity, so Im wondering if anyone out there has gone through this process and obtained a cert of conf? Did they even produce such docs in 1980? I heard I could write to yamaha UK and get information but is it bike specifi or just general for all TY 175s in UK, if so then a copy could be used to glean info. Any help appreciated. Ta

Thank you folks, I have a lot to thnk about now

Thanks, I appreciate your experience and advice. Not even TY175 forks? what are the differences? is that a common and good mod or not? You really know your TY's

Thanks feetup, At least it seems it has potential, I was thinking to contact the seller to return or sell it with the info I know. I'll contact the seller to ask what he knows or if he has the contact of the person who he bought it from There is a very very small chance I could find the original motor if all local people. Not easy to find a TY motor I suppose. I thought I had found a bike I had been wanting for a long time so quite disappointed today, I knew it needed work and happy to sort jelly suspension and wheels but I never realised it had the wrong motor, so easy to spot with a bit more info The frame number begins 525-221 Can you even buy the internal gearing for these engines? Thanks

Hi folks, just bought a TY175 at a fair price and I need some help to find out the bike year (roughly) and other info.. It is unregistered but all numbers are there. Couple of strange things about the bike (to my limited TY knowlege) It has chrome wheels and a different front brake plate to others I see, also a plastic generator case. The rear sprocket is HUGE with 60 (teeth?) stamped on it, After a quick internet search, the engine seems to be from a 1978 DT175MX , likely thats why it needs that big rear sprocket. Engine number begins with *2k4-then 6 digits. Dissapointed that the wrong engine is in the bike, I am positive the previous owner ( a police guy) didn't realise as he never used the bike after buying from a guy selling up bikes he had stored for over a decade. Is there any way to save/use this engine by changing internal gearing to get it the same ratios as a TY motor? I think there will be other differences such as ign type and flywheeel weight maybe the cylider ports also? Seems I have got some of a TY, it has a sammy millar tank/seat top and the frame is in very good condition. Thanks

Hi, Are there any alternative rear shocks from other newer makes that could be adapted to fit in the TY? Cheers

Thanks folks, On removing the exhaust on one of the TYs I found I was able to roll the piston side to side a wee bit, I guess that means the small end it totally shot? Yet when I got the bike started it did not sound bad which is impressive no doubt this will involve more than a small end change.

Thanks, looks like the red frame one may be an 85 according to that list. How about the white frame bike with the john shirt parts, would that be an earlier machine? Regards

Hi Folks, Just bought two yamaha ty 250 mono of unknown age. Bikes were bought as non running but complete. both 59N chassis id One has a steel tank with a white frame (poss originally red) it has J. Shirt on the flywheel cover and silencer, the steering lock has been cut down on that bike The other bike has a plastic tank, red frame with a dirt ground out rear link (flat where it faces rear tyre) There are differences in the frames with the red frame bike having a couple of brackets with holes on a down tube at kickstart side, the white frame bike does not have that. I could put all the best bits on one bike and keep the other for spares. I'd like some help on rough dates on these bikes if anyone can help. I'll have to go over both bikes to figure out the "better" bike. Thanks.

Thanks, If it works for fort william it will work for me, seems they set a precedent, I can use that if it needs to go that far.

how do the scottish six day riders manage it? No huge number plates there? I guess I can use the GPS speedo app on my phone if needed.

Hi, Can anyone tell me what I need to be able to (briefly) ride my new Montesa 4RT on the road. It is in the process of being road registered (7 weeks and still no sign of a V5!!!) When I last done this a long ago you needed a fork leg speedo, rear reflector and bulb horn. There will be occasions where it would be convenient to be able to ride it rather than push it.