I'm considering changing over from a 3TB clutch cover to a 4PT cover (with associated clutch component changes), and was wondering if anyone could tell me if the 4PT clutch cover is significantly wider to cater for the clutch release mechanism being incorporated into it?

Thanks, Peter

Thanks for the reply Andy - makes sense that it would be an overflow for the oil tank.

I'm guessing there have also been a number of people who have filled the tank up to the marked level whilst the bike is cold, without realising that the sump may also hold a large quantity of oil. At least that ...

Just wondering if anyone knows why the later 600 engines have the thinner oil breather hose take-off located on the crankcases instead of on the rocker cover?

I'm in the process of building a hybrid e-start XT/TT engine and have just noticed that the pipe location was moved between the 89 and 95 ...

Thanks - I missed that one somehow. Sounds like this idea is a 'non-starter' then.

Thanks for the reply.
I'm keeping my fingers crossed that someone on here has actually tried it, and has either had success, or has a detailed reason why it didn't work.

I am in the process of converting a 2001 TT600R (kickstart only) to an electric start - much like Yamaha did for the TT600RE in 2004.

Part of this conversion involved swapping the TTR crankshaft for a 3AJ XT600 one to get the longer crank taper end for the starter gear and associated parts. The ...

I'm looking to purchase a used bare frame and rear subframe for a 1999 TTR600.

I was wondering if anyone has weighed the bare frame or subframe so I can use the info for freight calculations.
Dimensions of the bare frame (minus subframe)would also be helpful if anyone has done that.

This will ...

Eric66 wrote:You can buy cometic 98mm gaskets from the states.
Regards Eric

Thanks Eric - I managed to get a 96mm copper one from an eBay seller - it seems to line up nicely on the barrel, so I'll use that for now. I just needed to know what the correct process for installing it was.

Thanks for the info Scottieh. It's good to hear that there isn't a need for re-torqueing.

I thought the annealing process was only needed when the gasket was reused, as a brand new gasket should still be very pliable - did you notice a difference after the heat treatment?

Is there a downside to ...

I've seen mention of others on here using copper head gaskets, so hoping for some advice.

I'm looking to fit an oversize copper head gasket on my 600 due to having some issues running the standard Yamaha gasket with a 1mm oversize bore.

Whilst the standard gasket is designed to be torqued once at ...