Turbo plumbing for a simpleton

[Maggotbreath]

Actually they look more like the bst34 carbs on the power screen 1100 bikes. Those were almost identical to the gsxr 1100 bst34 except the bars run across all 4 carbs just like the these 600f's. Makes them easier to work on and maintains carb balance when you take them off and reinstall. The other difference with the bst34 is the power screen jobbies have leaner pilot jets, keep that in mind when you get to tuning, might need to change those. Could you post up a pic of the bottom with the bowl off?

[El Gringo]

I think they're 32mm, Original off a GPX600 so Keihin CVKs but as you say near as dammit

Same as mk1 Blandit 6 i think, the B6 slide that I bought fitted anyway 

 

Edited December 13, 2022 by El Gringo

[El Gringo]

Hi all

Long time no speak! Hope everyone is well

Quick question, is there a genereal rule of thumb for piston to bore clearance for a turbo bike?

I did have a search back and found a thread that suggested 0.004-0.005 per Inch of bore

[Gixer1460]

Whatever the workshop manual states or maybe +0.001" greater. Ring gap is more critical and that is what your figure refers to - if you honed the cylinder to 0.015 - 0.018", the piston would be like a cock in a sock . . . . . . ie LOOSE! If you are using aftermarket pistons, the manufr. will usually state clearence required which could be less than stock if low expansion alloy's have been used.

[El Gringo]

54 minutes ago, Gixer1460 said:

Whatever the workshop manual states or maybe +0.001" greater. Ring gap is more critical and that is what your figure refers to - if you honed the cylinder to 0.015 - 0.018", the piston would be like a cock in a sock . . . . . . ie LOOSE! If you are using aftermarket pistons, the manufr. will usually state clearence required which could be less than stock if low expansion alloy's have been used.

Ta boss, this would be a set of stock Yamaha pistons going into Suzuki barrels requiring a rebore, so I guess go with the figure in the Yamaha manual.

It's a 59mm bore so a ring gap of 0.004 to 0.005 * 2.3" = 0.0092 or 0.0115 , gives 0.92 to 11.5 thou or 0.23/0.29mm

Does that sound about right?

[Gixer1460]

Most people would just be happy to shoot for between 10 - 12 thou. As regards that combination - all bets are off, and I don't want to know, how, why, when or where!

[El Gringo]

Right, ball park it is then

[El Gringo]

Right then, hello all, long time no speak

I did eventually get this comedy item to boost sort of, still requires a bit of fettling to get it running properly but i've not quite got round to it because I've started another one..................

Basically the same as the first one but a Bandit 4 rather than a GSXR 4

[gsx]

Let the madness commence 

[1100n]

keep up the progress