hi all

i have recently become the owner of a 07 rev3 125 and loving it

it has a loads of power for a 125 (well i think so anyway!)

i just have a few questions however;

1) in my haste to put the bike together (i had it shiped), i have sheared off one of the pinch bolts on the fork for the front wheel spindle.

is it ok with just one bolt or will i need to get this sorted?

2) something creeks badly when i do a drop off of land hard.

i think it is the bars however the mounts and yolks are as tight as they will go.

3) what is the recomended mixture? i am running it at 70:1 with castrol tts but it still smokes a tad.

any help welcomed.

max

Edited May 12, 200818 yr by yamahaty250xox

I'd be inclined to fix the pinch bolt. The strength of the front end is really a combination of all the pieces working together. That and you really wouldn't want to snap the other just because it is carrying the full load now. Then you'd have twice the work and you'd have to fix it. When you assembled the bike you must have really laid into the bolts. When assembling a bike it's better to make sure everything is aligned properly and snug the bolts. Check the alignment again and go for the final tighten but don't overtighten. After a few hours of riding you'll find several of the bolts loosen up as the frame and forks settle in. Just give them the once over with the wrenches to snug them down proper after every couple of rides. I like the T-handle allen wrenches for this because they're fast but also give good tactile feedback of just how tight a bolt is. After a few cycles of this the frame and front end will have settled down and won't need more then the occasional snug.

70:1 works OK. A trials bike will smoke after putting around for a while because they tend to pool a bit of oil in the bottom of the crankcase. If you watch the world or national guys they'll rev their motors up before a critical part of the section to make sure they are running clean and purge the residual oil.

As for the creaking, aluminum frames tend to creak. I've chased creaks in Beta frames since my '91 Zero and only managed to get about half of them. Usually I find bouncing on the pegs I get creaking from the frame at the skidplate mounts or the footpeg brackets. If you decide to chase the noise down don't try to fix it by just tightening the bolts as you'll end up having to fix them like your fork pinch bolt. try some lube on the frame where parts are bolted together as the creaking is pieces rubbing together under pressure. A squirt of WD40 or lithium grease can quiet down a creak not only locating it but often fixing it. The other thing to keep in mind is eventually the pieces that are creaking against each will wear in and the creak will usually go away on it's own.

Edited May 12, 200818 yr by Dan Williams