DT125R FORUM

Got it, thanks for your help everyone. Was planning to have a go but then had an episode and ended up in hospital. Now I'm back in the game.

BTW hotshot, I agree, I order most my parts matching against DT125lc MKlll.

Or are we saying the crank gear has nothing to do with it and the balancer shaft has 2 gears?

Thanks for replying. Just to be very clear (because I'm going to have a go at it today and I had this clutch cover off too many times already) is it the balance shaft gear and the crank gear that need to be aligned?
They both have indents as you said eng1968, I will
look out for them. It must be the crankshaft gear and the balance shaft gear right?

No I did not. I just put the drive gear on the crank willy nilly. So one of the gears it connects with is the balance shaft then I bet. Mmmm

OK, did the work today, clutch is now properly balanced but the bike engine is still causing bad vibrations. The other issue must be possibly the magneto but that went into a slot so can only go one way. Does anyone have any ideas?
FYI both crank seals were replaced so I would be amazed if the issue is not related to that activity.
Thanks, rob.

No worries people, I have found out what I did wrong. I now know how to line up the basket, the clutch and the steels. Now just goto get it done.

Hi there, I've finally got my bike back together after it took me forever to fit some new crank seals. Bike runs great, very happy, all those problems were, as it turns out, as a result of blown seals (I blamed so many parts and cleaned/ messed with the carb.
Anyway, although the bike is running lovely, it has more vibrations from the engine. I suspect it's because I put the clutch on wrong. A part that I have since found is balanced.

Can someone advise me how to line it up properly please?
Thanks, rob.

Oh no, I'd assumed they could be pulled out and replaced without touching the bearings or splitting the caes.

Hello everyone.
I've been having a problem with the bike over revving when throttle is closed. I have read and been through every possible fix except a) the reed block letting in air or b) the crank seal letting in air.
Yesterday I noticed the smoke from the exhaust smelled like a 90,000 mile 4 stroke so now I know its the crank seal/s (oil being pulled from the gearbox into the cylinder and being burned).
A question if I may:

• Am I missing anything from the list of parts I need to get this job done of replacing the crank seals?
  1, left and right side crank seals.
  2, clutch cover gasket
  3, Magneto cover gasket.

Thanks, rob.