Piston advice Plus

[dapper]

Yes, I'd followed that thread Paul NI, but wondered whether the distance around the cylinder that the inlet port swept may be a guide as to whether the cylinder is Stage 4, or the distance from the top of the cylinder to the tope of the inlet/exhaust etc, would give a guide as to whether the cylinder had been tuned from standard. As I was given the top end and I don't have another to compare it to of known tune, I'm sitting here shrugging my shoulders.

[sean brady scooters]

That cylinder looks pretty std to me. The top of the barrel to top of the ex/port on a typical stage 4 would be 34mm to 36mm

[Train Driver]

Never mind the dirty 2nd hand cylinder, what's that newspaper
Doesn't look like the daily telegraph

[dapper]

Thanks Sean. Have measured and actual dimensions are

Top of cylinder to top of exhaust = 40.5mm
Top of cylinder to top of inlet =75mm
Top of cylinder to top of transfers = 47.5mm

Does that give any clues?

[dapper]

Never mind the dirty 2nd hand cylinder, what's that newspaper
Doesn't look like the daily telegraph

That's a selection of Page 3 ladies

[sean brady scooters]

as far as the inlet port and timing,you would measure from top of barrell to the BOTTOM of inlet port ,
again yours looks std,
inlet ports on stage 4,s are usually lowered to increase the duration but dont forget that cutting some off the piston skirt also does that.

[sean brady scooters]

actually Dan and I were just thinking the other day about starting another section on the forum .."port maps" if anyone would be interested.

[corrado]

I could do with one of Southampton, always get lost looking for the ferry. Boom, boom.

[sean brady scooters]