New jug different, will it work?

R

Royale

New Member
I just ordered a new jug for my engine because the old one got lost when I moved. I ordered it off ebay and it came with an intake, new piston and rings too. I also ordered one from gasbikes but it's been on back-order for like 3 weeks now so I gave up and just went the ebay route.

The first thing I noticed is the piston is different in that the wrist pin is lower. The intake has 40mm spacing too.

I have a Skyhawk GT5 motor so will this work if I swap both the piston and jug out instead of just the jug like I was planning?

I'm really hoping I don't have to order another one as I am sick of waiting. I really didn't want a jug with 40mm spacing though because the intake is garbage.
 
Royale said:
I just ordered a new jug for my engine because the old one got lost when I moved. I ordered it off ebay and it came with an intake, new piston and rings too. I also ordered one from gasbikes but it's been on back-order for like 3 weeks now so I gave up and just went the ebay route.

The first thing I noticed is the piston is different in that the wrist pin is lower. The intake has 40mm spacing too.

I have a Skyhawk GT5 motor so will this work if I swap both the piston and jug out instead of just the jug like I was planning?
Click to expand...
Get the right Skyhawk part. Mixing brands will not work.

The only other company selling Skyhawk parts is.
http://www.pistonbikes.com/category-s/5.htm
 
Ok thanks. Hopefully the ebay company will take the other one back.

I just ordered one from pistonbikes.
 
Personally, I would carefully assemble it and see if it turns over without interference. But then again, I'm cheap and hate waiting for mail order parts.
 
along with diff pistons & barrels, there are diff rod lengths - if you try it & piston smacks the head, you won't be able to return it
 
As long as the crank/conrod are the same from the GT5 to whatever engine this is supposed to fit, I don't see what wouldn't work about it as long as I swap both the piston and cylinder.

If they are different though, then I could understand it not working.

These parts are cheap enough I might as well give it a test fit as long as no one on the boards knows for sure it won't work. I have the other one on the way anyway so all else fails I will just keep it as a spare.

The Colorado weather isn't being very bike friendly right now so I have some time before I can ride anyway.
 
I remember reading somewhere on here that someone on here had a gt5 and was looking for a cylinder that was 68.5mm between the faces instead of 69.5mm because it ran better and he said the ports were better designed. The reason I bought this one off ebay is that it said 68.5 so I assumed it was the correct one for my gt5.

Now that I know it's not a skyhawk cylinder I'm wondering if the 68.5 has any meaning that anyone can back up?
 
Just assemble it and carefully turn it over by hand to check clearances. It should be easy to tell if it will work or not...
 
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