Markws80 Posted July 6, 2019 Report Share Posted July 6, 2019 Can you get a 200cc kit to turn the 125 txt into a 200cc ? I know they did a lot for the old pot model did not know if it would fit the new txt Quote Link to comment Share on other sites More sharing options...
basil Posted July 6, 2019 Report Share Posted July 6, 2019 Better ask factory Kev BVM have a 225 kit Quote Link to comment Share on other sites More sharing options...
jha Posted July 6, 2019 Report Share Posted July 6, 2019 Quote Link to comment Share on other sites More sharing options...
jha Posted July 6, 2019 Report Share Posted July 6, 2019 It can be done, but rides totally different then the older GASGAS TXT200. No standard kit I suppose. My dealer bored a 125cc cilinder to 64mm. Quote Link to comment Share on other sites More sharing options...
Markws80 Posted July 7, 2019 Author Report Share Posted July 7, 2019 Hi can you please tell me more what cylinder piston head was used Quote Link to comment Share on other sites More sharing options...
jha Posted July 7, 2019 Report Share Posted July 7, 2019 Standard cilinder head TXT200. I think also piston equal to the former TXT 200, together with cilinder former TXT200 (in this case older TXT125 bored to right fit with piston). (Older cilinders and pistons a little higher, combination cilinder and piston should be OK was delivered by my dealer) Other parts: - Wider smal end bearing of former TXT200 - Base packing combination resulting in squish of about 1,5mm, smaller more agressive and not fits my style (50+). - Further made new flywheel weight, filling all available space behind cover, without adding cover spacer. - Let the exhaust reducer in place (more docile?, did not check) - 5mm longer bolts cilinder head. More power at low rev's, hoped for less aggresive at high rev's.. not being the case. These new 125 have new carters with minimal volume, higher volumetric efficiency. I like it very much and will not return to 125. Quote Link to comment Share on other sites More sharing options...
lineaway Posted July 7, 2019 Report Share Posted July 7, 2019 https://rypusa.com/s3-gas-gas-cylinder-kit/ Quote Link to comment Share on other sites More sharing options...
arnoux Posted July 8, 2019 Report Share Posted July 8, 2019 Yes it can be purchased through your local S3 dealer. S3 supply the complete kit for all TXT's (horizontal and vertical water pipe heads). We have done quite a few of them. Basically it is a 250 piston with a smaller gudgeon pin and matching head and cylinder. 1 Quote Link to comment Share on other sites More sharing options...
Markws80 Posted July 9, 2019 Author Report Share Posted July 9, 2019 (edited) Thanks for all you help I am going to do the 200 set up not the s3 225 kit i think the 200 would be better then the 225 Edited July 9, 2019 by Markws80 Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted July 9, 2019 Report Share Posted July 9, 2019 I rode a 225cc kit when it was first done. Excellent bike like a very soft 250 with a little bit of zip, i think ill go back to that soon.... Quote Link to comment Share on other sites More sharing options...
Markws80 Posted July 9, 2019 Author Report Share Posted July 9, 2019 I love my 125 but a little bit more off the bottom Is what I am looking for Quote Link to comment Share on other sites More sharing options...
jha Posted July 9, 2019 Report Share Posted July 9, 2019 225 kit not possible on GASGAS 125 with new crankcase (2015 or later?) Or carters should be machined. Quote Link to comment Share on other sites More sharing options...
Markws80 Posted July 9, 2019 Author Report Share Posted July 9, 2019 I think the the 200 and the 225 needs a bit of matching up ( machining) Quote Link to comment Share on other sites More sharing options...
Markws80 Posted August 16, 2019 Author Report Share Posted August 16, 2019 On 7/9/2019 at 5:18 PM, jha said: 225 kit not possible on GASGAS 125 with new crankcase (2015 or later?) Or carters should be machined. Do you know what needs to be machined dose it need to be re jetted? Quote Link to comment Share on other sites More sharing options...
sammyd173 Posted March 24, 2021 Report Share Posted March 24, 2021 (edited) On 7/7/2019 at 8:24 AM, jha said: Hello, my flywheel on my '17 TXT Pro is below. Could it be aftermarket? I have a friend with a '17 School 125 and it revs up SO much quicker than my bike and is a lot more fun to ride. I understand the stock flywheel is the same for both bikes. Can I just unbolt the three bolts and run no plate?! Do I have to pull the flywheel out to get rid of the plate, or do just the 3 bolts hold it on? Edited March 24, 2021 by sammyd173 Quote Link to comment Share on other sites More sharing options...
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