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Post by jjt on Aug 30, 2017 0:09:07 GMT -5
Dollar I appreciate the info so don't take offense to what I'm about to say. Also I'm not trying to ruffle any feathers here but not much of what you said makes sense to me.
How would anyone get injured from an open cvt? I could see maybe the clutch bell coming off and maybe hitting someone but that would be like worrying your wheel is going to come off of your car and going to go thru someone's house or hit a pedestrian. Can it happen? Yes it could. Could the brake line blow out and you run your car thru a crosswalk full of kids? Yes it could.
As far as getting my pant leg in my variator, I wouldn't worry about that to much. I assume you've never rode an old pan or shovel with an open primary and foot clutch. If or I should say when it happens it spits it out fast but I've never been hurt by it.
I'm not sure I understand the cvt as part of the intake. Are you talking about warming the air before it enters the carb? I'm not understanding how this would be a good idea either but I'm very interested in learning your theory behind it.
Like I said I'm not trying to ruffle your feathers. I just don't share your feelings on most of this.
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Post by jjt on Aug 28, 2017 21:14:47 GMT -5
I put the 11g sliders in today and it does launch a little better. Still need to look in to trimming the clutch weights but if I don't find anything I might just throw the red springs or yellow springs in to see what happens. I'm launching at about 5700rpm now.
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Post by jjt on Aug 28, 2017 21:00:57 GMT -5
how high is too high? when the belt starts rubbing the cvt case. the longer the belt, the higher it will ride, up to a point. the limiting factor will be the cvt case. start at the lower end of length, from 28 inch to 29 inch for example. when the belt starts rubbing the case, then the next smaller size is the largest belt you can use. also, your weight/contra spring combo must allow complete belt seating on the clutch pulley and complete closure of the variator. IOW, the above assume you can use the variator/clutch to their limits. my scoot ran with about 1/4 inch override, but i noticed the cvt case was shaving off about a 1/16 inch on one side. i believe i was getting just about all i could get. i'm not sure if i could have gotten more without throwing the belt. another big drawback is finding odd sized belts. So should I try a 842 belt? I'm running the 835 now |
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Post by jjt on Aug 28, 2017 20:55:07 GMT -5
Rear wheel is 13" front is 10" but the same diameter as the 13"(or pretty dang close). I read your post(piston) about running open but I wasn't sure if you ride in the rain. I honestly wouldn't worry myself about debris or the elements bothering the belt when the scooter is in general use. i just wasn't sure how the clutch pads would react to being wet. I also read your post about the variator. I just wasn't sure if it was possible to run it to high. Like will it climb clear up to the top of the pulley ? Hitting the case would definitely be to high lol but I'm planning on firing up the mill and cutting most of the cvt cover off. Not sure how much yet but I'm to cheap to buy a set up like pistons right now.
Also the dr pulley variator came with 3 shims it said was for tuning. Are these for this issue? To keep the belt from climbing to high?
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Post by jjt on Aug 28, 2017 15:43:01 GMT -5
so I pulled off my cover today so I could change out my sliders. I took out the 13g and put in 11g. I looked at the variator and there is about .158" between the top and how high the belt is going. Just wondering how high is to high.
I just had that cover off and cleaned it about 150 miles ago. I couldn't believe how much belt dust was in there.
Im seriously considering doing away with my kicker and cutting the face off of my cover or maybe just cutting off the face where the clutch is and keeping my kicker. I know I've seen a lot of pics of people doing this I'm just wondering if it would ruin the clutch if I got caught in the rain. My cover gets really hot after a long ride
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Post by jjt on Aug 28, 2017 15:25:26 GMT -5
Yes sir. Appreciate the help
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Post by jjt on Aug 28, 2017 0:57:51 GMT -5
I have good scales. Probably a lot more accurate than I would ever need for my new scooter obsession. I have a lot of different scales that I measure grains of powder with for reloading. I haven't read or seen anything about trimming clutch weights but I will try to research that.
I try to stay away from eBay parts and bought all my stuff from a dedicated scooter parts store in hopes of getting decent quality. I stuck with the same brand(hoca) for the clutch , clutch springs and torque springs. I know sometimes sticking with same brands of individual parts actually work better but maybe it's not the case here. Is hoca a junk brand?
I read several places that dr pulley made a good variator and weights. Is there something else or another brand I should switch too?
I'm also running a stock belt. It's an 835 and says bando on it. Should I upgrade the belt and if so do you guys have a recommendation?
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Post by jjt on Aug 27, 2017 21:59:52 GMT -5
I downloaded that speedometer app and done 2 runs today.   |
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Post by jjt on Aug 27, 2017 21:50:31 GMT -5
Hey man I just seen the link for the gy6 manual. That's awesome thanks
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Post by jjt on Aug 27, 2017 19:53:05 GMT -5
Hey piston did you take the cap with the small outlet pipe off of yours? I had left it in there but I took it off today. The sound is MUCH better now and a lot deeper. I need to change my main jet to a little bit smaller size. The pilot and needle are right where I want them but I had to back the fuel mixture screw off a little bit. It was lean at idle and just off idle.
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Post by jjt on Aug 27, 2017 11:36:09 GMT -5
The windings are similar but I assume there is a tension difference. I will more than likely have it apart sometime in the near future. I will measure collapsed height and pressure between all 3 springs when I do. I appreciate the info from people with hands on experiments but don't want to wear out my welcome either
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Post by jjt on Aug 27, 2017 9:53:47 GMT -5
when I changed my spring and clutch I installed a roller bearing base on the torque spring. I know it probably wasn't necessary but in theory it made sense on how it works. What I didn't think about at the time is that with it being a thicker base and adding more load to the spring , is it hurting anything? I put the yellow torque spring in and it was the same length as the stock spring I took out. I didn't check or compare the collapsed length or collapsed pressure but now I wish I would have. I noticed the blue spring was much shorter but I haven't tried it yet.
Sorry for posting all these questions but this scooter thing is still new to me. I appreciate all the help and answers
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Post by jjt on Aug 27, 2017 9:19:15 GMT -5
As long as you start the nut buy hand and don't go crazy with the torque it will last a good long time You are using good tight fitting sockets yes? Or are you referring to the big thin brass nut holding the torque Spring. Because that one is fussy and needs care when applying I'm referring to the big nut holding the torque spring. I've only had it off once but when I took it off the threads looked bad. I honestly wasn't sure it was going to go back on and tighten up but it did. Now I'm afraid to take it back off. |
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Post by jjt on Aug 27, 2017 9:12:31 GMT -5
Btw I am going to be doing a valve adjustment soon. I seen in the link you posted where the one guy said 4-6. You said be very picky on the valve adjustment. Did you find something that worked a little better ? Typically if I seen these specs I would set at 4. But I would also run it hard and check it again while it was still as hot as possible to make sure I wasn't closing that gap to much when hot.
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Post by jjt on Aug 27, 2017 9:05:28 GMT -5
Thanks for that link piston. Looks like I have more left in there than I thought. I haven't tried to tuck yet I'm trying to get 60 in a normal riding position. That may not happen unless I try a downhill speed run lol. Hopefully today or tomorrow I can check the variator to see how high the belt is going. I haven't checked it since putting the dr pulley variator on. I want to try the lighter sliders as well.
I was wondering when I was going to hit speeds where it started feeling unsafe. I haven't pulled my forks yet to see if they are serviceable.(I haven't done any research on it yet either). If they are I thought about seeing if I could add a touch more preload. I think I'm a bit heavier than the average guy that Yamaha assumed would be riding a 50 lol. Honestly at the speeds I'm hitting so far it feels rock solid and even as small as the front brake is , I am very impressed with the braking power.
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