ring end gap question

[Guest]

So I'm putting my 80 gs1100e back together with 75mm bores and pistons. What should the ring end gap be? By my math according to the wiseco chart the top ring should be just over .013" but they are more like .006". Did the last guy who did motor work on it just mess up or am I wrong?

[Steve]

Here ya go, straight from the factory manual.



.

[m.qualls89]

Ok thanks a lot! I was going off of wiseco's sheet that says multiply bore size by .0045" for street applications. So if I'm reading this right I can be anywhere from .004" - .012" on my end gap and be ok?

[posplayr]

I think I would go by the Wiesco numbers and not OE specs. I vaguely remember something like 0.013" but it has been a couple years since I did my 1166.

[rapidray]

Do NOT use the Suzuki specs!!! The WISECO specs are CORRECT!!! You will butt the ring gaps & kill the cylinders once the rings expand with heat if the ring end gaps are too small! I REALLY wish anyone giving advice would check to make SURE they know what they are talking about before advising people. Ray.

[tkent02]

He never said he was using Wiseco pistons.

I REALLY wish people would include the pertinent technical details on technical posts.

[m.qualls89]

I said I was using the Wiseco chart... sorry for the confusion.

[m.qualls89]

So just to clarify yes they are Wiseco pistons and rings.

[tkent02]

And Wiseco pistons?
Ths stuff matters.

[m.qualls89]

I'm not bein a smart a** so don't take it that way but why would someone use a Wiseco chart and not Wiseco pistons? Either way thanks a lot for the help. Its awfully weird that my ring end gaps on the old rings are only about .006" but then again that could be the reason my 4th cylinder was toast .

[stetracer]

I'm not bein a smart a** so don't take it that way but why would someone use a Wiseco chart and not Wiseco pistons? Either way thanks a lot for the help. Its awfully weird that my ring end gaps on the old rings are only about .006" but then again that could be the reason my 4th cylinder was toast .

Yep to tight of a ring gap.
Never go less than .004 for every inch of bore size so if you are at 75mm bore which is close to 3'' bore your ring gap should be at least .011 no less.

Ray,
It is amazing how much people miss read a post and then give bad info.

[posplayr]

He never said he was using Wiseco pistons.

I REALLY wish people would include the pertinent technical details on technical posts.

Do you know of any OE 75mm pistions?

[posplayr]

I'm not bein a smart a** so don't take it that way but why would someone use a Wiseco chart and not Wiseco pistons? Either way thanks a lot for the help. Its awfully weird that my ring end gaps on the old rings are only about .006" but then again that could be the reason my 4th cylinder was toast .

75mm pistions are 3mm over size and are definitely not stock and so definitely should not use the OE specs. Steve was just a little fast making his suggestion. I'm sure he did not realize what you had.