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Post by repherence2 on Jun 24, 2020 20:28:01 GMT -5
I did watch that one before. I’m right there, and think I need a stronger contra. I don’t want to do lighter rollers becuase it’ll raise my RPM too high. If the contra helps to slow the gearing up, I’d consider stronger clutch springs to get my takeoff into a better powerband. The issue with not getting full travel on either the clutch and variator is just kind of a wierd thing. As if I need to bring them clcoser, not shim them apart. Like grinding the drive face where it touches the drive boss. The drive boss (crank sleeve for the variator) length makes a difference in final top speed. A shorter boss allows the variator to close more at the sacrifice of initial take off. Adding shims to the variator in esssence "lengthens" the boss. This allows the belt to sit lower in the variator thus resulting in better take off. We might as well talk about drive belts. Belt length, width, and angle are factors. I could never get a 788 belt to the top of the variator. I had better results with a shorter boss and a longer and narrower belt.
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Post by lunatuck on Jun 25, 2020 9:32:36 GMT -5
I decided to drive my Tao Tao around for a bit yesterday. I have a feeling that has a stronger contra spring. When I let off the throttle, it does some "engine breaking". This keeps it in a lower gear better then the Buddy. That's what I need out of the Buddy. I think I'm on the right track with the contra, but shipping was delayed a day. So tomorrow I can hopefully try it.
And when it rains it pours... My Honda Jet Ski has some sort of issue. I think it's a relay. I love doing performance upgrades. I hate paying to fix oem stuff that breaks. Lol.
Ordered a hitch mounted motorcycle carrier also this week. I really think I need a new variator, but trying to keep my spending under control.
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Post by lunatuck on Jun 26, 2020 18:11:28 GMT -5
I installed the 1000RPM contra spring and it totally fixed my hill climbing acceleration and gave me much better mid end acceleration.. I can pull uphill right up to 55mph indicated.
I also installed a new pilot jet one step up because I have a hanging RPM when coming to a stop. I still have to tweak that. I may remove it because one other thing popped up and I want to be sure I know where it’s coning from. I have a slight lag in acceleration from a start. If its not the jetting, I may then try the new clutch springs.
The stock contra spring was so weak. I could see why it wasn’t keeping my in a lower gear. Its probably fine for slow cruising, but I like the feel of always having the acceleration there when I hit the throttle. If I’m rolling and hit the throttle, its accelerates immediately. Now I just need to find out what’s going on with the lag on takeoff. Then I can retweak the rollers. One thing at a time. Lol.
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Post by Mech Warrior on Jul 10, 2020 20:07:06 GMT -5
Lunatuck stiffen those clutch springs to malossi green and you will be a happy camper.
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Post by lunatuck on Jul 18, 2020 10:19:35 GMT -5
Lunatuck stiffen those clutch springs to malossi green and you will be a happy camper. I actually put yellows in and they improved the takeoff, but my issue is the loss of top speed. It seems like I've lost about 2-3mph. Sharpie tests don't indicate what exactly is wrong. I have changed a few things, but it seems to have come from when I installed the contra spring. It improved my hill climbing and seemed to improve throttle response, but darn I want those few MPH back. I did run through all rollers again to see if there was a sweet spot I was missing. Oddly, if anything it seems like slightly lighter rollers were better then heavier rollers, but this is the opposite of what I would think. Unless it all comes down to RPM, but even then the contra should've increased my RPM. I think.
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Post by Mech Warrior on Jul 18, 2020 10:33:50 GMT -5
Your belt may be worn i have lost a few mph after a few thousand miles.
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Post by lunatuck on Jul 18, 2020 12:37:07 GMT -5
Your belt may be worn i have lost a few mph after a few thousand miles. I’m wondering about that. It only has 400mi, but there is a lot of belt dust and I am at WOT a lot of the time. But, the width is only about 2/10ths of a mmm shorter then new spec.
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Post by Mech Warrior on Jul 18, 2020 12:45:16 GMT -5
It is quite possible in the process of tuning the CVT you may have had a bit too much tension on that belt it wore out very fast. Doesn't hurt to replace it,except maybe the wallet LOL.
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Post by lunatuck on Jul 29, 2020 9:34:33 GMT -5
Update: I changed the variator with an NCY golden pulley. The golden pulley's overall diameter is smaller, but matches the travel I was getting from the stock one. It was a bit lighter. I took a test drive and could tell it was different. I did some hills and my hill climbing has improved considerably. I was able to pull up some pretty decent hills right up to 50mph indicated (likely 45mph gps). But, I still wasn't able to match the top end I was getting early on.
Then, yesterday I went for a ride. It's been 90F plus for the last month. Yesterday it was mid-70's. The scooter easily matched and probably beat my old top speeds. I was easily hitting 60mph indicated. I could've gone faster, but the RPMs were hitting 10k and to be honest, it felt really fast. Too fast for me to ride unless I was on a freshly paved road. Too many potholes to take that risk.
I think my issue comes down to the outdoor temperature. I am probably going to increase the rollers a bit because I don't want to spin as high as 10k. I'm not sure what the Buddy crank or even wrist pin bearings can handle. There isn't nearly as much info out there as Zumas. I can't even figure out if a better crank is available.
But, I'm happy now. The scoot goes faster then I need it to. Just need some normal temps.
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