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[YZ250]

……….
Agree with this advice. But the fact that white marks are located in a place that will never match the teeth, makes me think the belt is mounted the wrong way. …….

I did wonder first of all but now think it’s marked wrong, which is odd as it’s as easy to mark it right as it is to do it wrong.

Not that it’s particularly relevant but:

Cam 1 = Long notch, so white line between teeth
Cam 2 = Short notch so white line on a tooth
Cam 3 = Long notch so white line between teeth (it’s not in the photo)
Cam 4 = Short notch so white line on a tooth (it’s not in the photo)

So it would still be wrong if turned around. 

[Dave G]

Thanks for your input again.

I took the general advice and ignored the lines. As everyone said, after a couple of turns they’re pretty useless anyway.

So as I say, I locked the crank bang on, wedged, ran the belt to 3&4, used the gauge to get it accurate, then aligned 1&2 on the gauge, using the upper idler to bring them into line.

Couple of turns, then adjusted again, reset the tensioner and turned again.

Every rotation test since then (about 4 I think) has brought the alignment back accurately.
No nasty noises on the rotations either…

Everything’s going back together now.

[Dave G]

IT’S ALIVE…!!!

Huge thanks to everyone for helping me through this.

Tried with no fuel and sounded OK. Fuel pump fuse in and first time!  A bit ticky and smoky but after 10-12 minutes it’s sweet.

I’ll compose a better ‘thank you’ when I’m less emotional…!!!

[TheBoy]

Well I bet you are pretty chuffed at sorting that out!

I've been following with constant anticipation - this thread has been like those OOF threads of old.  Fascinating and a testament to what forums can achieve.


Epic news

[Doctor Gollum]

Job very well jobbed

[YZ250]

Fantastic news.    I bet you're well chuffed. 

[Dave G]

I am mate. Well chuffed. Can’t stress enough how grateful I am for all the advice and encouragement on here.

A few jobs left. Drain and refill coolant. Change oil and filter. And a damn good clean next!

I think that if I could do this at almost 70, hip replacement, arthritis in hands and knees - well, anyone should be able to do it…!! With the help of OOF of course.

[STEMO]

Well done, Dave. You've been methodical and patient, and it's certainly payed off 

[Migv6 le Frog Fan]

Well done Dave. 

[polilara]

Really nice to hear! You did it.

[Dave G]

   Beer!!

[Dave G]

And of course… kiitos paljon.

[polilara]

Oli ilo olla mukana

[ronnyd]

Well done to you, don't think i could have but the advice that you get from here is always top notch. 

[Raeturbo]

Well done👍 now make sure you test and reward yourself handsomely, you deserve it.