143bhp

[ogri48]

lol cheers mate, appreciate that. I'll wait til im flush (one day huh) or sell one of the others and get in touch with the feller..

[robbo]

"if I ride until I'm 78 (optimistically)"......bollox that means I've only got 6 years to go. I'd better get my biking bucket list sorted and fast. I'm deffo having an Ivans on my zimmer with a 50mm jack up.

[Falcon 269]

Just to confirm that Ivan's jet kits are still available direct from his sole UK/European distributor, Stephen at SG Motorsport.

https://www.sgmotorsport.biz/product-cat...-jet-kits/

If you want the Full Monty MB jet kit, make sure you contact Stephen direct to ensure he supplies what you need.

Mike

[ogri48]

I went for the slip on kit fellers, I honestly don't need the full monty.
seems quite a bit to do (altering float levels etc) ill be downloading every bloody bit of info available afore I tackle it lol..

[Falcon 269]

It's more than just swapping out jets and needles but don't be tempted to omit any of the stage of the process. 

I would advise you to just enlarge one of the pilot circuit bypass holes - the middle one of the three - and set the mixture screws at 4 1/4 - 4 1/2 turns out. 

While you have the carbs out, I also recommend that you replace the O-rings on the float needle valve seats.  These harden and start to leak as they get older, and most are old enough to be at that stage now.  Do it while you have the carbs on the bench and save having to pull them again any time soon.

[ogri48]

all good advice and much appreciated mike. I think you'll be sick of hearing from me come Christmas when I tackle it lol..

[Falcon 269]

Probably LOL!

[ogri48]

While you have the carbs out, I also recommend that you replace the O-rings on the float needle valve seats.  These harden and start to leak as they get older, and most are old enough to be at that stage now.  Do it while you have the carbs on the bench and save having to pull them again any time soon.

Mike should I order proper Yamaha o rings/carb rebuild set or just use four that are the same size mate. just read the whole job from start to finish on pats page along with the addendum you added, it actually all seems pretty straightforward. I'll take the carbs off in the lock up, but do the work in the kitchen, on the table under good light..

[Falcon 269]

You'll probably find that you can't get the O-rings separately from a Yamaha dealer, as they're included as part of a carb rebuild kit that also has the float valve needle and other bits in it.  I guess a friendly dealer might let you have suitable O-rings from his workbench stock, though.

I just ordered some online from an ebay listing:

https://www.ebay.co.uk/itm/7-5-x-1-5mm-V...2749.l2649

[ogri48]

aha mate that will do nicely! and good call..my ageing vfr750 (my commuter before the thou) had a rear pot fill with petrol because one leaked. Unwittingly went to start it next morning and the hydraulic lock bang convinced me i'd knacked a con rod! it was ok as it happens, but gave me a turn thinking id buggered the engine for the sake of a o ring...

[slimwilly]

That "Falcon is such a helpful man " true