I have a 555 big bore kit w/ Wiseco pistons but they no longer stock the rings...Anyone know where I can get some rings????
Thanks
Try total seal.
Cool.
Srinath.
I've used Total seal rings.
Had problems with oil burning and too much crank case pressure blowing oil out the breather.
I've consulted some experts about them. The consensus is they work best for blown alcohol motors mainly. Plus there twice the price of any others.
Wiseco or JE should have rings that work. Just meaure the bore diameter in MM. Then measure the width and depth of the ring journals of the pistons.
Worst case, you can send a piston to Wiseco and have them figure it out.
If you had a custom Wiseco set made up, you'll have to talk to Wiseco directly, but they should have been supplied with rings that came in a little cardstock box that had the replacement details on it. If the pistons you have are the Vance & Hines set that Wiseco actually made, I think I can help. The V&H pistons are 79mm which equals 3.110 inch. The V&H pistons use the "XG" type rings. So all you have to do is call up Wiseco & order a set of "3110XG" rings & you're good to go. According to my 2003 Wiseco piston catalog, XG rings are available from 75 to 83mm sizes, so you shouldn't have any problem getting them. Who told you they were not available any more? If it wasn't Wiseco, call Wiseco direct & talk to someone who knows - 440.951.6600. BTW, most (maybe all) of Wiseco's rings are made by Hastings. I don't have a contact number here at home, but I can get it on the 5th when I go back to work if you hit a dead end with Wiseco & wanna try Hastings. I thionk you'll get satisfaction just calling Wiseco though.
Good luck!
If you had a custom Wiseco set made up, you'll have to talk to Wiseco directly, but they should have been supplied with rings that came in a little cardstock box that had the replacement details on it. If the pistons you have are the Vance & Hines set that Wiseco actually made, I think I can help. The V&H pistons are 79mm which equals 3.110 inch. The V&H pistons use the "XG" type rings. So all you have to do is call up Wiseco & order a set of "3110XG" rings & you're good to go. According to my 2003 Wiseco piston catalog, XG rings are available from 75 to 83mm sizes, so you shouldn't have any problem getting them. Who told you they were not available any more? If it wasn't Wiseco, call Wiseco direct & talk to someone who knows - 440.951.6600. BTW, most (maybe all) of Wiseco's rings are made by Hastings. I don't have a contact number here at home, but I can get it on the 5th when I go back to work if you hit a dead end with Wiseco & wanna try Hastings. I thionk you'll get satisfaction just calling Wiseco though.
Good luck!
Quote from: Bob BroussardI've used Total seal rings.
Had problems with oil burning and too much crank case pressure blowing oil out the breather.
I've consulted some experts about them. The consensus is they work best for blown alcohol motors mainly. Plus there twice the price of any others.
Wiseco or JE should have rings that work. Just meaure the bore diameter in MM. Then measure the width and depth of the ring journals of the pistons.
Worst case, you can send a piston to Wiseco and have them figure it out.
OH... OK... Total seal is supposed to work with low pressure on the cylinder wall right... might be why blow by is high. Thanks for the info.
Cool.
Srinath.
The total seal rings are highly used in dragracing where a combo of High power Fuel ,compression,(forced in some) and extreme heat from lack of cooling system, after the 45 secs of running everything is tight as a frogs rear. those rings are soft too,and are only good for a day of runs at best. From what im told from someone who has built drag cars and hotrods for long time, is that total seal does make rings for street application too. getting them in Small Bore sizes would be the hardest part. i understand that total seal rings are not cheap either.
Thanks for the help...I'm calling Wiseco on monday.
I was told by a machine shop that they can't get the rings...I don't know how hard they tried. I DO have Wiseco pistons so they should make rings also. hehe
Thanks again
JWHITE
:dunno: here in uk we are told that there is nothing piston-wise available for the gs as they are near max capacity to start with and so would leave cylinder walls VERY thin.
But there again most tuners i have spoken to wont even look at a gs5 they just tell you to buy a bigger bike :nana:
Quote from: madhatter:dunno: here in uk we are told that there is nothing piston-wise available for the gs as they are near max capacity to start with and so would leave cylinder walls VERY thin.
But there again most tuners i have spoken to wont even look at a gs5 they just tell you to buy a bigger bike :nana:
What you have been told is technically correct - - - but GS500 owners are a stubborn & resourceful bunch....
There is no longer an aftermarket big-bore kit available for the GS. Vance & Hines used to sell one that was made to their specifications by Wiseco & was only available through V&H. If you called Wiseco they would claim no knowledge of the kit whatsoever. If you were lucky enough to get your mits on a V&H set & you started to look at installing them in your GS, you found that, yes indeedy, the cylinder walls were gonna be scary thin once they got bored big enough for the 555 kit. V&H said go ahead & do it, & I've heard of people doing it (the cylinder wall down at the bottom ends up only about 0.020inch thick when done), but I went ahead & had custom thicker sleeves made up that gave me more like 0.080 or 0.100 wall thickness (I don't remember exactly).
There are other solutions to the big-bore question out there, but most involve custom made pistons.
Never, never, never, never give up!!!!
In AFM the rule for 500 twins is 500cc + 1mm overbore.
The stock bore is 74mm (487cc)
500+1 mm = 76mm (513)
77mm wouldn't be a problem. Each mm = 13cc with stock stroke.
I would definately resleeve if you wanted to go to 79mm.
The rings I use are JE XG7600 ( for 76mm pistons)
You could call JE and see if XG7900 would work with the wiscoe pistons.
JE PISTONS (714-898-9763)
15312 Connector Lane
Huntington Beach, CA. 92649
I know a guy who is building a GS motor somewhere in the 800cc range. Pressed out the stock sleeves, bored the cylinder and pressed in new sleeves from another bike. Not sure if using custom pistons or stock from the donor bike. The cases had to be milled to accept the larger sleeves. The compression is kept low to keep from braking crank shafts on deceleration. I believe he will being running with a flywheel.
Quote from: dgyverI know a guy who is building a GS motor somewhere in the 800cc range. Pressed out the stock sleeves, bored the cylinder and pressed in new sleeves from another bike. Not sure if using custom pistons or stock from the donor bike. The cases had to be milled to accept the larger sleeves. The compression is kept low to keep from braking crank shafts on deceleration. I believe he will being running with a flywheel.
Are you sure? This would require a bore in the neighborhood of 95mm. I'm certain that would not fit in the cylinders - it would break into the cam chain cavity if nothing else. Also, what bike would have 95mm pistons to "donate" ? I think your friend is pulling your leg....
Maybe he's building a GS750 into an 800...
I don't think he is bs'ing too much but may be inflating the final displacement some. He never mentioned anything what the actual bore & stroke would be. I want to contact the shop that is doing the work and get all of the details, if they will tell me.
With the stock stroke you would need 95mm pistons.
Even if the cylinders could handle the pistons, the crank probably won't.
Cedrick Smith up in washington built a GS with a gsxr head. He used cosworth pistons from a big bore kit for a gsxr 1340 (85mm).
That bumped displacement to 650cc. He had alot of trouble breaking cranks, so he had a custom billet crank made (KA_CHING$$).
I've broken a few myself without monster pistons.
I modified my cases to install another thrust bearing between the cases and the countersprocket gear. The theory is it will minimize crank flex at this area from the helical drive gear pulling on the crank. Only time will tell if it works. But I can see definate wear on the bearing so it's doing something.
i was told that using gsx 1100 sleeves give you lots of meat to work out of but you need to press out old sleeve, bore cyl and machine the cases for new sleeve to clear, i have such a case here, (least i believe i do) but no sleeves
whats 1mm overbore rings go for? and how much improvement to performance is it?
I just installed a set of 1mm over pistons. In themselves not alot but with high lift cams and a decked head to increase compression, it now has a much quick & stronger throttle response = more torque & hp. I paid less than $200 used for all with the bored cylinder. The cams themselves are around $270 from Megacycle (//www.megacycle.com)
Quote from: Bob BroussardWith the stock stroke you would need 95mm pistons.
Even if the cylinders could handle the pistons, the crank probably won't.
Cedrick Smith up in washington built a GS with a gsxr head. He used cosworth pistons from a big bore kit for a gsxr 1340 (85mm).
That bumped displacement to 650cc. He had alot of trouble breaking cranks, so he had a custom billet crank made (KA_CHING$$).
I've broken a few myself without monster pistons.
I modified my cases to install another thrust bearing between the cases and the countersprocket gear. The theory is it will minimize crank flex at this area from the helical drive gear pulling on the crank. Only time will tell if it works. But I can see definate wear on the bearing so it's doing something.
Cedric Smith had a lot of different configurations... He was breaking cranks with a 680cc motor, then dropped to 580cc and the breaking stopped but so did the winning, then he went to ferrari F1 pistons and 569cc and that made a big improvement, After that I dont know.
Cool.
Srinath.