• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Pistons and bores question

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

Guest
Hi all, name is marco and I have a 1980 gsx1100et, I think it's called gs1100e in the States.
The bike has started to blow oil out of the breather pipe and it's down on compression on the middle pots so I am getting ready for a top end stripdown.

well, official suzy dealer is asking me 35 uk pounds per set of rings!

but I found that I can get complete Wiseco pistons for $30 at a piece!!

However, the wisecos all seem to be bigger (76mm and up to 80mm) than what I have now, accordingly to the manual my bores are 72mm bore (2.835in)
question is, can I rebore the block to take these pistons?
I think I heard of people doing it, or am I mistaken?

Also, how much clearance should there be between piston and bore?Say I go for the 76mm pistons, should the bores go up by 0.25? or more? I am not sure and I can't seem to find the info.
My local machine shop don't have a clue as they do mainly cars and they are asking me!

I guess I could just go the easy way and spend lots of money for just original rings, but it seems silly to do all that work (and new gaskets) and not go for the whole new pistons, at cheaper price.

can anybody help?

thanks a bunch in advance!
 
Usually the pistons come with information for the machinest as to the bore/skirt clearance required. Wisco piston kits are available new for $400 $450 us funds. Includes pistons,pins,rings. You would need the street kit 10 to 1 compression. the 13 to 1 kit is a racing part. I would also find a different machine shop. It would be a great preformance increase since you are going to do the top end anyway
EDIT UPDATE Suggested list $481.08 includes above plus head and cyl base gaskets KIT #K1133 1133cc (2mm over)
 
Hey Marco - where did you find Weiscos for $30 per piston?
 
I understood that to go above 1100cc, you need to get bigger liners installed into the cylinders (bored and pressed in). It is quite expensive.
 
Don Lobacz said:
I understood that to go above 1100cc, you need to get bigger liners installed into the cylinders (bored and pressed in). It is quite expensive.
Click to expand...

Actually, no, I have the 1166 kit, just plain overbored, but if memory serves, anything larger than that, you need to re-sleeve and you must increase the diameter where the sleeve enters the upper case half, they also make 'big block' kits that entirely replace the stock cylinder block and allow you to go to 1500cc, of course with major mods to upper case half
 
You must log in or register to reply here.
Back
Top