Need More Topend!!!!!

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SymnatiionBoyee
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Need More Topend!!!!!

Post by SymnatiionBoyee » Mon Mar 07, 2016 8:01 am

fastest I've got my bike to hit is 69mph and I'm trying to go faster with parts that i have before having to buy upgrades to make it faster....share your thoughts....

Sym Dd Block
Stock Crank
7:4 Gearing
72cc Polini Corsa(Ported)
Pg Long Pipe(Fliped Cone)
28oko Carburetor
55Pilot 138Main
1 1/2 Air Fuel Mixture
Stock Clutch
1,000 Center Spring
3,000 Clutch Springs
Kelli Pulley/Ramp
33 Gram Weights
Polini Blue Ramp Guides

Cmoped9
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Re: Need More Topend!!!!!

Post by Cmoped9 » Mon Mar 07, 2016 4:34 pm

Just going off what others have said, and g9 did the dyno. The PG is not a top end pipe, so I've heard, don't take my word on that, as I do not know from personal experience, but you could probably spin a higher RPM with a better pipe. As for your original question, I have no idea. 69mph is only a dream of mine.
2000 Elite SR
Malossi Cast, 24mm Polini (36/110), 9.8 gears, Naraku intake, PG long exhaust, 6k yellow Polini clutch springs, 5g roller weights. Top speed: 60mph

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bonesv
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Re: Need More Topend!!!!!

Post by bonesv » Mon Mar 07, 2016 5:02 pm

Those Keli ramp plates are not the best by any means. Try an SEF ramp plate and use a new Honda oem belt.
I can get my elite going 69 mph on a malossi cast, 26 oko, pg short, polini vari, sef plate, w/8.44's!
Honda Elite SR
Honda Elite-Dio ZX

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Meloshameless
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Re: Need More Topend!!!!!

Post by Meloshameless » Mon Mar 07, 2016 7:42 pm

I hit 70 with my stock crank and gears, its all about having a quality pipe, carb, intake, vari. And cdi helps... G9 just got arrow pipes!
2000 Honda SR (purple swurp)
corsa
naruku
polini 21 cp 36/106 pod filter
polini vari 5.5 gram
zx trans
Polini evo2 clutch/bell yellow springs (slacked) yellow contra
Yasuni C16
stock crank/gears=wheelie machine
70 mph/12,470 rpm Trail tech vapor verified

veedubh20
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Re: Need More Topend!!!!!

Post by veedubh20 » Mon Apr 25, 2016 2:30 am

lose weight rider . :coolcruise:

1man8scoots
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Re: Need More Topend!!!!!

Post by 1man8scoots » Mon Apr 25, 2016 11:16 am

More aggressive porting. Who did the porting and what is the timing now? With those gears you need some torque. Might want to try a different pipe to match the porting you have currently.

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Wheelman-111
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Re: Need More Topend!!!!!

Post by Wheelman-111 » Tue Apr 26, 2016 3:51 pm

Greetings:

Not that 69 isn't a respectable top speed for 72ccs, but before seeking further modifications I suggest you determine what are the limiting factors in the build you have now. Top speed is determined in part by gearing, but more so by maximum engine RPM. So, what is the RPM reading at 69 MPH? Corsas love to rev, and as some have suggested the Long PG isn't the best-suited pipe for achieving the 11K-12K of which the Corsa is capable.

The gearing thing matters if you're fully shifting the belt-drive, and you may not be if you're pulling against 7.somethings. Sharpie your Drive and Driven Faces to see if the belt travels all the way to the rim in front, and to center out back. Now I'm not sure about hitting 70 with Stock 12:1 gears, but Flash 3.26 saw its best top speed with 7.97s, and today I believe it might've been faster with 8.2s or even 8.44s if the RPM increased back into the peak power zone for an unported Corsa.

Finally, although Big Carbs are popular in the Sandwich Islands - perhaps that dense Hawai'ian air allows for more fuel to mix - 28 is an awful lot of carb for 72ccs. It might run, but almost certainly not very efficiently. Consider a 26 or even a 24 for cleaner-running through the rev range.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
Still Seeking Red PCX-150
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox, Carb and Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 99KPH

:coolcruise:

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Trafficjamz
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Re: Need More Topend!!!!!

Post by Trafficjamz » Thu Apr 28, 2016 1:23 am

Meloshameless wrote:I hit 70 with my stock crank and gears, its all about having a quality pipe, carb, intake, vari. And cdi helps... G9 just got arrow pipes!


You hit 70 on stock gears? :bs:

stock gears would have to spin at nearly 15k to go 70 mph.

Maybe you did 70 kph on stock gears. :lol:
new best 1/8th mile time 9.647 seconds @67.155 mph 310lbs total weight

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Trafficjamz
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Re: Need More Topend!!!!!

Post by Trafficjamz » Thu Apr 28, 2016 1:47 am

veedubh20 wrote:lose weight rider . :coolcruise:
and get taller gears. :wink:

If you don't weigh much, tall gears can get you over 70mph
new best 1/8th mile time 9.647 seconds @67.155 mph 310lbs total weight

Meloshameless
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Re: Need More Topend!!!!!

Post by Meloshameless » Thu Apr 28, 2016 4:37 am

Yes, my trail tech vapor showed it hit 71.4 and 12,680 rpm on my set up and i also only weigh 125. B4 the guage i used a gps phone app which said i hit 65 only cuz i kept catching up to traffic and then has to get off the freeway, which im not supposed to be on in the 1st place.
2000 Honda SR (purple swurp)
corsa
naruku
polini 21 cp 36/106 pod filter
polini vari 5.5 gram
zx trans
Polini evo2 clutch/bell yellow springs (slacked) yellow contra
Yasuni C16
stock crank/gears=wheelie machine
70 mph/12,470 rpm Trail tech vapor verified

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