Rejetting GS1150 bored to 1199 for Weisco Piston kit

[robert_r_lefebvre]

I've bored out my GS1150 to accept the Wisco 1199 piston kit. Does anyone have an idea on how much the jetting should change? Do I simply change the main jet by 2 sizes?

Thanks
Bob

[rapidray]

I would only go up 1-2 sizes on the main jet to start with. You will also need to re-adjust the mixture screws as the bigger bore will increase the vacuum signal to the carbs & pull more fuel. You may even find that the needles will need to be a little richer. Ray.

[chef1366]

What are you running for an airbox and pipe?

[neil w]

I would wait and when run in do a plug chop, my GSX1100 SZ katana always ran slightly rich on the standard jetting, after a rebore and wiseco 1166 pistons plus a K&N replacement panel filter the mixture on standard jets was spot on.

[robert_r_lefebvre]

I'm running stock airbox and pipes.

[robert_r_lefebvre]

Thanks for replying Ray, when you say that I may need to adjust the needles, what exactly are you refering to?

Thanks
Bob

[rapidray]

The needles inside the carb slides. If you don't have a jet kit, with adjustable needles, in your carbs that needs to be your next purchase. Are you running stock exhaust? Ray.

[robert_r_lefebvre]

Yes, my exhaust and airbox are stock.

Bob

[rapidray]

Do you want more power or are you just one to like it all stock? I ask because there is a pretty good gain in power & weight reduction if you go to a 4 into 1 & individual filters. If you want, give me a call at 714-356-7845 as it will be easier for me to talk on the phone than to type all this stuff out. Ray.

[robert_r_lefebvre]

Thanks Ray, I'll call you on Wednesday.

I'm in Ottawa Canada, what would be a good time for you?

[rapidray]

Anytime between Noon & 10:00 PM, Pacific time. Ray.