GS1000 Pistons: What are my options?

[wera racer]

Machinest says my cylinders need a bore and one over pistons.

Wiseco offers only 3mm and 3.5mm over options (not sure a 1085 motor would be legal for my class of racing).

OEM sites list a 0.5mm and 1.0mm pistons, but the math by the time you buy everything individually (pistons, rings and pins) comes in north of a Wiseco complete kit.

Does anyone make a 0.5mm complete kit? Are there any other options?

Much obliged,
Rick

 

[Nessism]

In your other thread you said you bought pistons. What happened?... http://www.thegsresources.com/_forum/showthread.php?t=172174

That thread also contained a guy selling some .5mm OS pistons w/cylinder. That looks like the hot tip assuming the cylinders clean up well with a hone job. The bike only had 22k on it so the pistons/cylinder are likely in good shape.

 

[wkmpt]

What about sourcing some stock-bore cylinder sleeves and replacing the worn ones? (I'm asking 'cuz I really don't know.)

 

[wera racer]

In your other thread you said you bought pistons. What happened?... http://www.thegsresources.com/_forum/showthread.php?t=172174

That thread also contained a guy selling some .5mm OS pistons w/cylinder. That looks like the hot tip assuming the cylinders clean up well with a hone job. The bike only had 22k on it so the pistons/cylinder are likely in good shape.

I thought I had--through the machinest. Now he's suggesting I find them myself, saying he can't save me any money buying them for me.

I've put a lot of time and money into this vintage racer and have already been burned on used that parts that were supposed to be OEM, etc. and I'm not up for buying someone's used parts at this point.

 

[rapidray]

I can give you a deal on new CPs but they would be custom made & will run you about 700 bucks. At least you will get the BEST pistons made & we can get them made to the bore size you need to remain legal. You need to check the rules & then build to the max edge of the rules! I know it's a little pricey but CPs ARE the best & we can get them made to YOUR specs! Let me know if I can help, Ray.

 

[Nessism]

This guy has a set of .5mm overbore Yoshimura pistons for sale. True to the Yoshimura tradition of the era, they used only one compression ring. The guy doesn't have rings but said he thinks you can use stock Suzuki rings, or you can have rings made by a company like Hastings. You might want to ping him... http://orangecounty.craigslist.org/mcy/2202721004.html

 

[wera racer]

To heck with all this. Is the GS1100 a direct swap with the GS1000 as far as motor mounts and carbs? There's a real nice one on eBay and I can go that route for less than a top end kit.

 

[rapidray]

Yes!!!! that's the way I would go too! There is NO comparrison in the power & you will NEVER look back!!! Ray.

 

[wera racer]

Yes!!!! that's the way I would go too! There is NO comparrison in the power & you will NEVER look back!!! Ray.

Then that's the plan. Thanks for your help. I've started the search for a good GS1100 motor and will do the minumun to the GS1000 motor to get it on the track so I can test the new suspension and get some laps in until I find a good GS1100 motor.

Many thanks!

 

[TeamDar]

Just because you find a GS1100 motor doesn't mean it won't have to be rebuilt. Until you open it up and check it you won't know if it's any better than what you already have.

 

[wera racer]

Many thanks to Frankenzuki for guiding me to MTC Engineering in FL. They have reasonably priced 71mm (1025cc) piston kits for $250. They are NOS and not on their web site...Ask for Cliff. I'm checking with my machinist now to see if they will work with my bores. There's hope yet. Will still plan on a GS1100 swap when I can find (and afford) the right motor.