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Post by ramblinman on Dec 13, 2013 18:37:06 GMT -5
just finished installing my new 50mm piston. measured my old one and was a little surprised that it had a 44mm piston. i don't know if it came stock that way or if one of the previous owners upgraded?
so i was expecting about 50% boost when i thought it had a 39mm piston. am i correct in assuming i am only going to see a 12% boost in power going from 44 to 50? meh, wonder if it is going to be worth it.
haven't started it yet. a bit afraid, lol. if it doesn't start or runs bad, i'm not doing anything else until tomorrow.
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Post by larry001964 on Dec 13, 2013 19:44:07 GMT -5
Hi Ramblinman
Sounds like you have one of those secret 63's. Many scooters were made with a 44mm kit and sold as a 49cc.. Any way expecting double the power I don't believe is realistic even if it were a 39mm piston..
It will give you more power for climbing hills, holding speed in the wind, but probably not much more top end.. But that depends on your variator setup and weights. If your variator was opening up all the way with the 63 then you won't get any more speed, just get there faster. I think it's worth it, I believe you will notice a difference...
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Post by tvnacman on Dec 13, 2013 19:53:54 GMT -5
Hi Ramblinman Sounds like you have one of those secret 63's. Many scooters were made with a 44mm kit and sold as a 49cc.. Any way expecting double the power I don't believe is realistic even if it were a 39mm piston.. It will give you more power for climbing hills, holding speed in the wind, but probably not much more top end.. But that depends on your variator setup and weights. If your variator was opening up all the way with the 63 then you won't get any more speed, just get there faster. I think it's worth it, I believe you will notice a difference... Larry , did you mean the variator closing all the way ? John |
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Post by ramblinman on Dec 13, 2013 20:44:47 GMT -5
I think it's worth it, I believe you will notice a difference... i hope so. soon as i get it started i will feel a little better. just tried about 10x seemed like it was going to catch on the second try. if it doesn't start i'm not sure were to begin. i made way too many changes all at once. |
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Post by larry001964 on Dec 13, 2013 21:01:05 GMT -5
Yea I did mean closing all the way, glad you caught that.. I was taking care of my 5 month old grandson, and he was being fussy, wasn't focusing like I should have been. LOL
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Post by larry001964 on Dec 13, 2013 21:06:36 GMT -5
I think it's worth it, I believe you will notice a difference... i hope so. soon as i get it started i will feel a little better. just tried about 10x seemed like it was going to catch on the second try. if it doesn't start i'm not sure were to begin. i made way too many changes all at once. Well often what I do on the first start after an upgrade, I take off the vacuum hose going to the valve cover, suck on it to get the carb bowl filled, then I have a small diabetic syringe that i will squirt just a little shot of fuel down the Intake where the vacuum hose connects up to the valve cover and then put the hose back on. This often helps on that first start and that way you don't drain your battery that much.. Hope it helps |
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