finnerz89

Clutch release bearing maybe?

There could be a throttle stop, restriction in the carb, maybe a rev limiter. There's a few ways to do it unfortunately so I can't really say

Maybe a chrome cover for his rear?

Sounds like a restriction of some kind. Aren't 50cc bikes limited to 32mph (could well be 37mph with an optimistic speedo) Maybe it was restricted down to match that rule?

I thought you just fill out the changes form attached to your v5 and send it off?

Sad times mate! Glad we got out for a few weekends though. You'll have to find yourself another money-sapping hobby now

I'm not expert on the engines to be honest so I couldn't tell you for sure. But I think the 4FU was tuned a bit more, in what way I don't know for certain. You'll noy go far wrong with a 3MB though. Mine is good for 75 (GPS speed so accurate) and that's geared down for acceleration

Not sure on a source other than the usual ebay, Facebook groups etc. There is a DT125 forum too. I think you're referring to the 3MB00 barrel? That's the one to have unless you can get a 4FU from a TDR or TZ125 belgarda But the stock engine in your bike is pretty good, the only restriction being the exhaust (and cat) and the rev limiter. Both easy to get rid of

Nice to have you back!

That's the one weekend I can't do as I'm in Scotland

I'm always up for a meet. No real preference on location either!

You either have a massive leak in the inlet system, or more likely the slide or butterfly in the carb is stuck open

A picture would really help....

You can check out any time you like but you can never leave

Love my sena. Never used it for intercom though, just music

Just spotted a rather nice TDR on ebay. Must resist the urge https://www.ebay.co.uk/itm/304828211372?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=wN5DkCwVTJS&sssrc=2349624&ssuid=u24CvQQSTva&var=&widget_ver=artemis&media=COPY

Strange that him and Kev disappeared at the same time

The vertical one will be stamped. Shot blasting shouldn't hurt it but get your powder coater to mask it off before coating as the powder will fill it. You can then clear lacquer over the area to protect the bare metal.

Probably sold off and then scrapped

Probably not a scam, but I'd expect them to need a lot of fettling to get them to fit.

Yeah there's not much point replying to a post that's over 10 years old...

Is it not the VJMC that can do this?

Excellent. Keep us updated!

Aren't bikes fun to work on!

Just did a forum search. Found this https://yamahaclub.com/forums/topic/37812-67-yamaha-yr1-tranny-problems/#comment-224074