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10-24-2015, 10:50 AM | #1 |
Join Date: Oct 2015
Posts: 2
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New Member Big Bore Stroker Question
Hello everyone I just joined and this is my first post. I am a huge scooter fanatic on the quest for more power The problem is I have a 1p52qmi. I know the 1p52's (125cc) and the 1p57's (150cc) are the same besides the cylinder. All the reading I've done says that the difference with the p is in the head. Well if I buy this kit, won't it work since it basically replaces everything from the bottom up?
http://www.ebay.com/itm/SCOOTER-150C...RTqXpj&vxp=mtr Also, he says that it does not require a spacer. A +6mm stroke is alot to have no spacer no? Is all of that clearance cut out of the piston? The guy's feedback isn't too great so I'm a little weary |
10-24-2015, 12:43 PM | #2 | |
Join Date: Dec 2014
Posts: 738
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10-24-2015, 05:46 PM | #3 |
Join Date: Oct 2015
Posts: 2
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Thanks for the reply Irish. I know a spacer would lower the compression and give me valve clearance, but I'm not sure what you men by "put me back where i am now". I'm still getting the extra displacement from the longer stroke, around 20cc's I think with the 63mm bore.
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10-25-2015, 12:33 PM | #4 | |
Join Date: Dec 2014
Posts: 738
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P.S 0.63mm is only 0.02480 in Last edited by Irish; 10-25-2015 at 12:44 PM. Reason: ad PS |
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11-20-2015, 01:18 PM | #5 |
Join Date: Jul 2012
Location: NE oHIo
Posts: 159
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yes, you are correct
Dirtrider. Irish, where did you come up with the .63 mm number? Kinda hit it sideways with that one. With a spacer, the compression ratio will drop, but you do still get to keep the increased displacement. without the spacer the piston is likely to hit the bottom of the head. As for working with your engine, I can't say. All these chinese manufacturers have their own designs I think. Based on the same honda design.
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1981 C70 honda 2007 Xingyue ita 150t(X2) 1976 Vespa Bravo(2) 1980 Vespa Ciao 1967 Sears Allstate Do I continue? "Freedom is just another word for nothin' left to lose." Janis Joplin 1943-1970 |
11-21-2015, 09:28 AM | #6 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
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Yes that kit will work fine w your 1p52. Not it does not require a spacer.
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2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats. |
11-22-2015, 12:01 PM | #7 | |
Join Date: Dec 2014
Posts: 738
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Tags |
1p57qmj, big bore, differences |
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