Busa piston tolerance.

[slabbyfaceddean]

Hi does anyone know what tolerance busa pistons / rings run in 1127- 1200 block please.

Thanks inadvance 

[SiBag]

I would suspect the same as they would do in Busa barrels.

But I'm sure an adult will be along in a moment.

[Gixer1460]

As Busa barrels are nikasil coated aluminium the ring clearances are liable to be tighter as barrels will expand at similar rate to pistons. Clearances in a Steel barrel should be as for the GSXR - piston to cylinder clearance - 0.05 - 0.06mm, Ring end gap (installed) - Top ring 0.2 - 0.35mm,  2nd ring 0.35 - 0.50mm

[slabbyfaceddean]

On 8/14/2019 at 4:28 PM, Gixer1460 said:

As Busa barrels are nikasil coated aluminium the ring clearances are liable to be tighter as barrels will expand at similar rate to pistons. Clearances in a Steel barrel should be as for the GSXR - piston to cylinder clearance - 0.05 - 0.06mm, Ring end gap (installed) - Top ring 0.2 - 0.35mm,  2nd ring 0.35 - 0.50mm

Thanks Gicer 1460, I have seen it on here before but could not find anything on it. 

Cheers