I did my mains recently and one of the seals was tight. I had to clean it up a bit with some really fine wet and dry, just to kinda deglaze it. Lite smear of grease on the seal and it went in easy. Don’t forget the right seal is one sided. It should have outer wrote on one side. Also it doesn’t go all the way in. It sits flush with the outer edge (or it does on mine 1988 3bn). It shouldn’t be a bear to fit cause it’s only the outer that’s touching anything, unless you left the spacer in the crank. You just need a longer tube to drift it...

You really need to check the back of the piston that isn’t exposed to exaust gas at the manifold. The piston skirt is exposed to the ex manifold on the upstroke.

Easy job. Put it in a vice with a small wood block to take the pressure off of the ‘fingers’ (also used to support the end of file to keep it square) and breezed it. Didn’t even need the wig🤪 Finish off with a flat needle file & wet n dry... Just needed the confidence that people have done it before and it’s doable...

I should clarify, 4T oil in the transmission fluid. Gear oil in the Aprilia though

As far as I am aware only one drive pulley, all mine early models.

Ok, thank you so much, just got a little worried that i had It the wrong way

Just do it when no one else is home

Someone at Yamaha put it there for a laugh so people for years would ask whats this hole for?

@SpookDog said in Cylinder/exhaust problems: I’d be interested as well, specially if you have the head to match... Me? If so shoot me a message bud, they all match and they’re even the same pair that come together in Italy nearly 30 years ago

@jonne123 as long as you put the 750 in and didn’t leak or spill any it’s fine

I need to tap m6 thread.

Thanks for answering!

@jonne123 look a few videos up on YouTube there’s one I saw yesterday that shows the gear drum

The engine vibrates like mad!

Ah right. I think I run like 14 or something on my DTR lol

They are different, new one is larger I think, have a brand new one on the shelf and will not fit older bikes

Should smoke a wee bit from cold. Then clear up.

@Calum Ok thanks very much

Thanks for responding! I tried to unplug the killswitch, but nothing happened. The side stand switch is unplugged. Where is the fuse? Is it with the battery, cause i dont have a fuse there.