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Bit spare time today. Refitted the old lock stop after some reshape and found some gsxr clutch spacers , going to tap and mount them on the bottom yoke . Any ideas on a petrol tap that will clear the frame

Will do. Thanks.

just take your time and make sure the rings are in place, the thin oil control ring can pop out and get trapped between the piston and the bore, let gravity help with gentle taps with your hand on the top of the cylinders.

Thank you all. Seems pretty unanimous. I'll let you know how I get on.

You could get you standard cams reground, use the 816cc kit and have the head ported/flowed. O course you will be running a good exhaust

I think there was a fella on one of the older OSS sites called Pete who had a very well tuned up gsx750, cant remember what it was putting out but it was a lot more than standard.

yeah found an 816 piston kit, was just wondering if I could optimize the higher capacity with some top end upgrades. No luck finding anything specifically for the ES. Yeah that might be possible. I will cross check if it would fit. Thanks for the insight.

Would of thought your best bet would be the 810 kit if they still do it? and a good porting job. Though i wonder if you could fit a gsxr750 head? seeing as you can fit the gsxr1100 head to the 1100 air cooled lump. Defo more fun than going the easy but dull route of fitting a different engine.

Anyone here have experience upgrading their 750es engine? specifically cams, rockers, valve springs? mostly looking at the top end.....

Whilst that may be possible with car / truck / tractor blocks, it is virtually impossible through the bottom of a bike crankcase - as others have said either 2 x 2 or all 4 together is possible with a couple of pairs of hands!

as wraith says, its the way ive always done it. put 2 blocks of wood under the middle 2 pistons and then carefully slid the cylinders over. im the same never got on with the ring clamps so an old blunt screwdriver works for me with plenty of oil round the cylinder taper.

Welcome to OSS I take it being a 91 it's a oil cooled motor not air ? You will find the best way is to build the bottom end and fit the positions to the con rods then slide the barrels onto the piston. You can get piston ring clams but I've never got on with them.

Hi. I am rebuilding my 91 1100 engine. What is the best way to get pistons back into the barrels?? Put the barrels on first and pistons through the top? Or crank and pistons into cases and slide barrels on?? Any advice very welcome. Thanks in advance.

the stems press right in tho...... rf is like et, threaded hole inside stem and top hat style stem....... fairly certain.

Apparently wintergreen softens them right up.... I however have no idea what that is or where to get it

Might be a bit late to mention it, but remember there are two different cam cover gaskets, 20 bolt and 24 bolt. Plus, are you sure your oil leak isn't failed o rings on the centre cylinder head bolts?

Yes,join the VJMC and you can do the parade laps good fun they are,think it's £35 to join now.

Thanks but I was hoping to have a more readily available answer/shortcut. Something like "I have done it, in order to have both light and side stand switch you need these P/N which are from bikes of that year and market" I know perhaps I am asking a lot, but yes that's what I want!

it'll be a keeper then

Yes you need to be a member of the VJMC which costs. A good friend lent me his identity so didn't need to although I would have joined. Fill the form in pay a small charge if I remember correctly. Then wait your turn.

Cheers, Gents!

I didn’t have a lot of choice…Cost a fortune that I won’t get back! The crank work including welding cost me £700.

Glad you decided to strip it down and have got it sorted

Whats a rough ballpark figure for the crank welding? I have a spare ET motor i have the urge to stick some Nitrous through.

glad its sorted but that dealer in the video should be shot for trying to sell a bike with that noise !!!! is he deaf