series 1 150 to 175 conversion ?
you could but arn't series 1 barrels shorter ??
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right ,well id have to assume then that a 175 conversion piston is going to be too long without packers and such like ,you would probbably be better off with a series 2/3 barreltea5ive wrote:yes ric, that's why I am askingRICSPEED wrote:you could but arn't series 1 barrels shorter ??
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tea5ive
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probably easier as you say to use a series 2 or 3 cylinder . just built up a series 1 150 frame breather engine and wanted to use as much as I could of the original engine but also give a bit of an upgrade. put a mec ure gp crank in with a 60 stroke( that's what I had on stock) so that would not have made it any easier with a short cylinder. I have also added an electronic ignition. I have lots of cast cylinders so will find a series 2 or 3 150cc to rebore to 175 or 185. put a wanted add out for a top end kit but the offers I received were all too good for this as I will be selling on once finished, don't think I would gain any more cash if put on a mugolla or gt etc. also the cost of rebore + head re-profile and piston kit bring you into the realm of the ebay cheapo cast/ally sr type kits.
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johnd
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Series ones pistons have the same compression height as a tv175 piston, 30mm, so yes you can bore out a series one cylinder to 175 if you use one of these pistons. You can also use a Suzuki TS185 piston and have 186cc.
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Solerunner1
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Yeah, i was gonna say the ts185 route too. The series 1 barrel allows for a more milder tune than the standard short cylinder version. And you have the option of higher quality pistons. You will need a 1mm or so packer though. The wiseco pistons are solid and reasonably priced.