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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


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  #11  
Old 08-28-2014, 08:04 AM
stian stian is offline
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Originally Posted by Jakobi View Post
Thats backwards. An A piston will give you more clearance again. Based on what you specced your cylinder at Wossner suggest a B which gives 0.07mm clearance. Thats a forged piston, so you may wish to run a bit more than a cast. I'm sure you could drop a C piston in and still be fine, but what if..?

What was the size of the piston you just pulled out?
Yeah, was in a hurry there.

Wossner is forged, but looking at standard GG piston, and I presume thats cast.

Forged= 0,07
Cast = 0,07 or if I dare; 0,06 (making B to a C in this case.)


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  #12  
Old 08-28-2014, 01:27 PM
Chaz955i Chaz955i is offline
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Hey All,
I'm a bit confused and hoping to learn something. Aren't these cylinders plated? Are the different piston sizes to accomodate cylinder wear or manufacturing variances (pistons matched to cylinders)? I'm probably missing something very basic so don't beat me up too bad.

Thanks,
Chuck
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  #13  
Old 08-28-2014, 02:33 PM
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Originally Posted by Chaz955i View Post
Aren't these cylinders plated? Are the different piston sizes to accomodate cylinder wear or manufacturing variances (pistons matched to cylinders)?
Yes the cylinders are plated. The size differences are from manufacturing and each cylinder is marked with a letter A, B, C from the factory. The letter indicates the bore size and should be matched to a piston with the same letter when new. After some wear one could measure the bore and match it up with a piston according to the table given above.
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Old 08-29-2014, 08:51 AM
Chaz955i Chaz955i is offline
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Originally Posted by Anders View Post
Yes the cylinders are plated. The size differences are from manufacturing and each cylinder is marked with a letter A, B, C from the factory. The letter indicates the bore size and should be matched to a piston with the same letter when new. After some wear one could measure the bore and match it up with a piston according to the table given above.
Thank you for the explanation.
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  #15  
Old 08-29-2014, 12:20 PM
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The pistons from GG are EXPENSIVE! The price goes up roughly 30% when they put a GG part number on it. I would buy an aftermarket one.
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Old 08-29-2014, 12:31 PM
Elvis74 Elvis74 is offline
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GG is mostly S3 and they are produced by woessner and vertex.
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Old 08-29-2014, 02:31 PM
stian stian is offline
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The pistons from GG are EXPENSIVE! The price goes up roughly 30% when they put a GG part number on it. I would buy an aftermarket one.
Now, Since motocrosscenter doesent resepond to well on emails, Im open for suggestions for other online shops who also will send to scandinavia.

Motocrosscenter retails the GG piston for 300ccm to 133 euro. In my eyes, thats decent. Vertex is to pricey for my part, and my use.
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Old 08-29-2014, 05:30 PM
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Quote:
Originally Posted by stian View Post
Now, Since motocrosscenter doesent resepond to well on emails, Im open for suggestions for other online shops who also will send to scandinavia.

Motocrosscenter retails the GG piston for 300ccm to 133 euro. In my eyes, thats decent. Vertex is to pricey for my part, and my use.
You could always try our "local" web shop 24mx.no.
I think my son got a piston there some time ago. I checked now, but did only find some horribly expensive ones. I think the have some more normally priced ProX as well.

Last time I bought a piston for my 200, I used trialendurodirect.co.uk

They are approx £100 if memory serves me correctly.
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2015 EC200 Racing: TE bars, Rekluse Core Exp 3.0, 38mm Lectron & Ohlins S3 steering damper
2006 EC200: 2011 plastics, Rekluse Z-Start, revalved KYB forks & Scotts steering damper
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  #19  
Old 08-30-2014, 09:43 AM
stian stian is offline
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Originally Posted by Anders View Post
You could always try our "local" web shop 24mx.no.
I think my son got a piston there some time ago. I checked now, but did only find some horribly expensive ones. I think the have some more normally priced ProX as well.

Last time I bought a piston for my 200, I used trialendurodirect.co.uk

They are approx £100 if memory serves me correctly.
Going to check it out, but I am in need of some other parts as well. Licenceplate-holder with light due to registration and some small other parts.

Kinda funny to have a business, and not answer order-mails thought.
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  #20  
Old 08-30-2014, 12:24 PM
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Jim Cook Jim Cook is offline
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The last piston kit I bought for a Gas Gas was a "coated" Wossner 250B piston. I bought it off ebay from a UK seller. I caught a special price, but one has to watch for those things. I paid $150USD, including shipping, and it arrived quickly.

The seller's ebay store is http://stores.ebay.co.uk/Bike-Tyres-UK .

Here is a current listing from his store:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...tchlink:top:en

Good Riding and Wrenching to You!
Jim
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