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Post by bendover on May 1, 2015 15:04:54 GMT -5
Hey guys, would a gear DOWN kit improve acceleration from standstill? I have a Stage6 Sport Pro Mk2 on a yamaha aerox (horizontal minarelli lc, similar to zuma), with stock derestricted exhaust. I am looking into ways to get better take off speed. If YES, where can I get hold of such primary or secondary gears? They seem to be like unicorns  Regards! |
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Post by Elektrey on May 1, 2015 15:17:00 GMT -5
I don't think its the best route.
First things first:
Do you have clutch springs for later rpm engagement?
Is your variator stock, roller weights stock?
check your CVT, is the belt riding to the edge on the back pulley?
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Post by 2TDave on May 1, 2015 20:30:56 GMT -5
I ran that cylinder with a stock pipe. It wouldn't pull the wheel but it did run strong from a stop. I don't think you'll get much more from it. Tuning your cvt would be the place to start. I wouldn't down gear.
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Post by vlatx on May 2, 2015 5:34:31 GMT -5
Put a Stage 6 pro replica,or yasuni c16,tune the CVT and you will see the full benifit from that kit,it produce from 10 to 12 HP with good pipe at aroaund 10.000 RPM
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Post by bendover on May 2, 2015 9:58:52 GMT -5
I don't think its the best route. First things first: Do you have clutch springs for later rpm engagement? Is your variator stock, roller weights stock? check your CVT, is the belt riding to the edge on the back pulley? Yes, stock variator, 4.7g rollers. Springs are not stock, not sure what rpm but will try stiffer (malossi fly clutch with white springs awaiting at home). How far should the belt go out pn the rear pulley, should the flat top of the belt be higher than the pulley edge, lower or exactly same height, and how could one adjust it? |
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Post by bendover on May 2, 2015 10:10:28 GMT -5
Put a Stage 6 pro replica,or yasuni c16,tune the CVT and you will see the full benifit from that kit,it produce from 10 to 12 HP with good pipe at aroaund 10.000 RPM Thank you for your feedback. Though I would recommend anyone coming here for acceleration from standstill to NOT go this route, but to instead avoid it. This exhaust is dead at low rpm, like 1hp, seriously. I bought my Stage6 Sport Pro cylinder together with the Stage6 Pro Replica exhaust, and takeoff is worse than stock exhaust. However once you end up in 8-10000 rpm it really kicks. While sounding like a formula one car, not really usable for daily use. I used 3.5g rollers and it was a blast but standstill acceleration was poor (first second or two). You could remedy this by installing stiffest clutch springs that engage at 6000 rpm, which makes it even less friendly for daily use because of loud noise and high rpm and difficult snail-driving in traffic jams etc. If you have no issues with angry neighbours or police in your area, this could be a route to go. My Pro Replica was used for two test runs and now collecting dust, brand new. Using stock exhaust. |
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Post by vlatx on May 2, 2015 10:35:55 GMT -5
Тhe stage 6 you have is race oriented,not for daily use,you shooed use malossi/polini/naraku 70cc base kit,and use it with Leovince GP,giannelli next,Leo Vince SP3,Stage 6 street for hiqh torque and nice every day commuting.
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Post by bendover on May 2, 2015 11:52:35 GMT -5
Тhe stage 6 you have is race oriented,not for daily use,you shooed use malossi/polini/naraku 70cc base kit,and use it with Leovince GP,giannelli next,Leo Vince SP3,Stage 6 street for hiqh torque and nice every day commuting. Thanks! Which exhaust is most quiet? Also have you tried Tecnigas Silent Pro or Leovince ZX/Yasuni Z - would you recommend them too? |
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Post by Elektrey on May 2, 2015 14:11:12 GMT -5
I've got the stage6 sport pro with Tecnigas next-r and it produces power around 8-9k RPM. Very peaky
It does give a great launch and we'll see if I can get the wheel off the ground, currently waiting on a performance vari and 2k springs.
The flat part of the belt should be riding as far outward in the pulley as possible without it coming out of the pulley (i.e. still being held inside the pulley) if it looks like its riding towards the edge you should be good.
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Post by 2TDave on May 2, 2015 14:22:31 GMT -5
The Yasuni C16 works great with that cylinder. I ran the pair before switching to the mkii race. I did see revs higher than my comfort level with a stock crank. If you tune your carb and cvt setup you can get a good launch with a chamber pipe. My current setup pulls great down low but my clutch is set to engage at 7500 rpm. That's the key, to get the revs in or near the power band and the clutch gripping before the cvt starts shifting.
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Post by moofus02 on May 2, 2015 14:37:11 GMT -5
The problem i see is you want to wheelie and keep it quiet and at low rpm. That cylinder makes power between 8 and 11. A milder cylinder and a street pipe or something like a yasani r that has a fat power band that is wide but at a lower rpm would be a better choice. A pro rep is dead below 8k so it will take a good cvt setup to do what you want but at a higher rpm
Sent from my SPH-L720 using proboards
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Post by vlatx on May 2, 2015 15:01:53 GMT -5
The Yasuni Z is 50cc oriented pipe,great pipe i have very good expirience with the Z,the R on other hand is good for 70cc kits,it will run wery well on the S6 cylinder,but you will have to ajdust the cltuch to engage at 6000rpm at lest.
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Post by Elektrey on May 2, 2015 15:30:09 GMT -5
The Yasuni C16 works great with that cylinder. I ran the pair before switching to the mkii race. I did see revs higher than my comfort level with a stock crank. If you tune your carb and cvt setup you can get a good launch with a chamber pipe. My current setup pulls great down low but my clutch is set to engage at 7500 rpm. That's the key, to get the revs in or near the power band and the clutch gripping before the cvt starts shifting. How do you get the clutch to engage so late? besides clutch springs. Lightening the clutch shoes? |
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Post by 2TDave on May 2, 2015 16:19:57 GMT -5
Yes. I have an adjustable S6 clutch but you can accomplish the same thing with springs. It's important though to make sure you don't set it up so late that the pulleys start moving first. Otherwise you lose first gear and low end. You can check by running the bike w/o the cvt cover and watching the pulleys as you rev and feel for the clutch to engage.
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Post by bendover on May 2, 2015 19:59:42 GMT -5
Does anyone have experience with motoforce exhaust? According to 50cc dyno it really rips low end, is it reliable to suppose similar for 70cc? www.pedparts.co.uk/blog/stage-6-pro-replica-exhaust-triumphs-exhaust-shootoutQuestion 1) Here is a dyno of stock exhaust on sport pro 70cc, perhaps one could use both of these to intrapolate the motoforce exhaust to at least beat de-restricted stock exhaust easily, which i am currently using? www.pedparts.co.uk/blog/tecnigas-exhaustNote: These two charts show the 50cc stock with motoforce exhaust (£50) beats my 70cc with de-restricted stoch exhaust in low end EDIT: stock exhaust in both 50cc and 70cc dyno is restricted. Question 2) If there is problems getting wheelie power while quiet AND low rpm, if I reconsider and allowing somewhat high rpm and clutching at higher rpm, perhaps 6000rpm, what exhaust would at least be quiet(ish) while doing so? (Stage6 Pro Replica being loud as hell as a reference.) |
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