Vibrations after new crank seals fitted. DT200R 1987

[Hoolies]

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.

[BEng1968]

Did you line up the balance shaft correctly? Both gears have indents which need to line up

[Hoolies]

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

[HOTSHOT III]

@Hoolies @beng1968 It does sound like the balance shaft gears aren't aligned, I didn't even know the pre-DTR engines had a balance shaft to be honest. This is where I went to find out, DT125LC MkIII is (I think) the closest I could think of, might be worth ordering items 24, 26 and 27 if you need to remove and refit the balance shaft gear:

https://www.fowlersparts.co.uk/parts/4047858/dt125lc-1hr-1987-999/crankshaft-piston

[Hoolies]

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?

[Hoolies]

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

[Hoolies]

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

[HOTSHOT III]

@Hoolies Yes the balance shaft only has one gear, assuming it's the same as the DTR balance shaft gears you just need to ensure the dot on the balance shaft gear is aligned with the dot on the crankshaft gear.

[Calum]

Shouldn't be too difficult.

You see the little dot on the balancer shaft cog, that should align with the corresponding dot on the crank gear. On the DTR, it's like the piston is at TDC for the dot to align.

But should be simple enough.

[Hoolies]

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.