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 Post subject: Re: Big Bore Setups
PostPosted: Thu Jul 01, 2010 8:49 pm 
I think its both. The whole case gets hot. I noticed that after maybe 10 miles of hard running my top speed will drop to 57 mph or so instead of 58-59. I think the belt is glazing or slightly melting and either slipping or not climbing the variator right.

I want to make some sort of scoop for the variator and vents for the clutch. My Aprilia RS50 is like this. I think the GY6 is as well. The poor Ruck variator was not designed to go this fast I think.


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Junior Mint
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 Post subject: Re: Big Bore Setups
PostPosted: Fri Jul 02, 2010 6:20 pm 
Thanks. Ya I ride pretty much speed limit and WOT hardly ever. Plus its alot of stop and go traffic. It works real well. I just dont wanna do any damage at all. I'll probably get oil cooler just for piece of mind. Its too hot to ride mid day anyway :lol:

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 Post subject: Re: Big Bore Setups
PostPosted: Tue Jul 06, 2010 2:53 am 
theruck1 wrote:
Infidel wrote:

Would having a vent such as the following help with adding a few more miles to belt life?


I don't think it's as much the heat as it is the friction on the belt, especially with a strong contra spring. I drilled evenly spaced holes around the "Honda" on my cover to get some heat out. I figured it can't hurt.


when u reach max speed blimp the throttle from 3/4 to full throttle. this keeps the stress off ur belt and engine ;)

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 Post subject: Re: Big Bore Setups
PostPosted: Tue Jul 06, 2010 10:10 am 
I can't see how that does anything, can your explaine?


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 Post subject: Re: Big Bore Setups
PostPosted: Tue Jul 06, 2010 6:52 pm 
smartbomb wrote:
I can't see how that does anything, can your explaine?


when u reach max speed (belt at highest position on the pully/variator) and u keep it at WOT it's like taking ur car and driving it on the freeway on 3rd gear. let go the throttle a little to relief the stress on the CVT and engine then re-throttle it to maintain the max speed.

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Donkey Puncher
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 Post subject: Re: Big Bore Setups
PostPosted: Tue Jul 06, 2010 7:56 pm 
where did you read that? or how did you find that out?

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 Post subject: Re: Big Bore Setups
PostPosted: Tue Jul 06, 2010 8:34 pm 
oh my bad i just realized this is a BB for GET motor section. my older comments was towards larger motors with more HP.

i would check the pulley/variator and pulley boss to check if there isn't too much slack. also check the rear variator to see if it's not warped. air vents to cool off the CVT also helps.

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Needs Training Wheels
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 Post subject: Re: Big Bore Setups
PostPosted: Sat Aug 07, 2010 3:16 am 
Would BB be applicable for Zoomer? Since zoomer uses FI, will the FI be able to manage and take advantage of the higher displacement if you do a BB on a zoomer?


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Donkey Puncher
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 Post subject: Re: Big Bore Setups
PostPosted: Sat Aug 07, 2010 10:17 pm 
i don't know if this will answer your questions, but a Chanito Big Bore 4valve piston exists, and is sold by Tokyo Parts, the last i heard. it is made for a 4 valve head, which as far as i know only FI engines have.

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Needs Training Wheels
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 Post subject: Re: Big Bore Setups
PostPosted: Sun Aug 08, 2010 6:25 am 
varroa wrote:
i don't know if this will answer your questions, but a Chanito Big Bore 4valve piston exists, and is sold by Tokyo Parts, the last i heard. it is made for a 4 valve head, which as far as i know only FI engines have.


Thanks for the prompt reply. I guess I have to get in touch with Chanito and ask for further info.
Btw, I'm from Baguio City, Philippines. I'm the only guy having a zoomer in the city. Would be nice to add even just 10kph (6.25mph).


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Sith Slayer
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 Post subject: Re: Big Bore Setups
PostPosted: Sat Aug 14, 2010 4:09 am 
:D

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Needs Training Wheels
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 Post subject: Re: Big Bore Setups
PostPosted: Sun Aug 15, 2010 7:59 pm 
cokiaja wrote:
Honda Zoomer PGMFI
No bigbore
Kitaco CDI
Dynoboost AFR tuning
Handmade Foam air filter
Polini exhaust
Kitaco variator, 5gr drpulley weight
Kitaco belt
Jog's driven pulley
Drpulley clutch, black clutch spring, green pillow spring
Yamaha Mio stock contra spring
Stock tires
Top speed 76 km/h on flat, 83 km/h downhill
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So the Jog driven pulley matched with the Kitaco variator on a zoomer? Any pics please?


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Junior Mint
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 Post subject: Re: Big Bore Setups
PostPosted: Sun Aug 29, 2010 9:29 am 
Image Image

absolutely match!

Or, you can use Yamaha Mio driven pulley by adding 5mm washer at drive shaft and use dr pulley clutch kit.
Yamaha Mio has bigger diameter than jog's plate, acceleration much better than jog's, top speed still same for both.

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Last edited by cokiaja on Fri Dec 03, 2010 1:49 am, edited 2 times in total.

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Rusty Trombonner
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 Post subject: Re: Big Bore Setups
PostPosted: Mon Sep 13, 2010 5:50 pm 
Anyone with new data?

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TR's Mad Scientist!
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 Post subject: Re: Big Bore Setups
PostPosted: Sun Dec 19, 2010 7:15 pm 
:twisted:

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