Clinician
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Post by dirtrider1219 on Oct 25, 2015 17:51:15 GMT -6
Interesting info cyborg, although with these scooter engines I don't think it would be worth the hassle or cost to ground the crank like that. And I'm not even sure you can order rods with a smaller big end. Interesting nonetheless. So these guys that do the +8.2mm strokers and 232cc get away with it because they're using a 67mm bore which helps the rod angle?
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Clinician
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Post by dirtrider1219 on Oct 25, 2015 15:21:37 GMT -6
This is great info!  So for a more reliable street engine, it would be better to get a Taiwanese made stock-stroke crank, and a 63mm bore? Or will the stock crank hold up ok with the 63mm? |
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Clinician
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Post by dirtrider1219 on Oct 25, 2015 8:19:23 GMT -6
Thank Diver great info!! I would imagine on that original kit that being such an extreme stroke with no spacer that the bottom of the piston is probably flat. Check out what I found though. www.ebay.com/itm/321885825517?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649It says "stroker ready piston", but I'm not too sure. So we agree that running even a thick cylinder spacer is better than messing with the piston right? Also if you got a piston like on your last picture, would you drill those oiling holes out or just leave them? Doesn't the piston move side to side where the wrist pin goes through the rod, so it's steel to steel, and not steel to aluminum? That could open up a potential wear point no? |
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Clinician
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Post by dirtrider1219 on Oct 24, 2015 11:26:52 GMT -6
So I just went and measured mine and i have the 54mm spacing, so i should be good to go. What else could possibly stop this from fitting?
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Clinician
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Post by dirtrider1219 on Oct 24, 2015 10:38:25 GMT -6
I know but I messaged him and his reply was "The 2 bolts 6mm att The haed and cylinder have difference measure. You can see in you tube, thanks". First of all the bolts are 8mm, and secondly I've never heard about the spacing on those side 2 bolts being any different. "The people who sell engines are not the same people who build them" great quote I read somewhere.
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Clinician
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Post by dirtrider1219 on Oct 24, 2015 10:26:08 GMT -6
Sorry, it's fixed
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Post by dirtrider1219 on Oct 24, 2015 9:09:55 GMT -6
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? www.ebay.com/itm/SCOOTER-150CC-GY6-HIGH-PERFORMANCE-HEAD-BIG-VALVE-STROKE-6MM-CYLINDER-63MM-/171969743962?hash=item280a320c5a:g:hsYAAOSwFTRTqXpj&vxp=mtrAlso, 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 EDIT: Update on page 4. I have also learned that yes, the kit I linked above and other 200cc stroker kits WILL fit the p engines. As long as you replace the crank as well and the kit comes with it's own timing chain that's the right length. You could even use the stock crank, they are the same, but you need to split the cases anyway to install a shorter timing chain. |
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So for a more reliable street engine, it would be better to get a Taiwanese made stock-stroke crank, and a 63mm bore? Or will the stock crank hold up ok with the 63mm?
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?