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Post by adkbiker on Sept 13, 2016 13:31:41 GMT -5
I added a TTO Trail Tech tach, thanks to bit of help from 90GTVert on the tech pages. Good idea, found out I was topping out at 5800 rpm WOT. I don't have a great scale but estimate 8.5 - 9 g rollers. I installed what I weighted as 7 g rollers from my old engine and now 6800 rpm and much better acceleration and hill climbing. The tach is well worth it! I installed lead wire direct to coil input.   |
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Post by gsx600racer on Sept 13, 2016 13:41:48 GMT -5
I added a TTO Trail Tech tach, thanks to bit of help from 90GTVert on the tech pages. Good idea, found out I was topping out at 5800 rpm WOT. I don't have a great scale but estimate 8.5 - 9 g rollers. I installed what I weighted as 7 g rollers from my old engine and now 6800 rpm and much better acceleration and hill climbing. The tach is well worth it! I installed lead wire direct to coil input. @6800 RPM, it wouldn't hurt to try 1 gram lighter rollers. |
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Post by adkbiker on Sept 19, 2016 16:58:11 GMT -5
 My Scrappydog order arrived! 1. Koso variator with 6g sliders: Installed it and see marked improvement in acceleration and hill climbing. The RPMs get more quickly into the mid 6000s starting up and seem to top out in the low 7000s. The CVT feels a bit different with sliders vs. rollers, but could be the different variator too I suppose. I think the power might come on and off a bit more abruptly. It's not a negative, just something I noted. Perhaps there is some break-in time that will affect this. 2. Scrappydog lithium battery: Wow, is this battery light! It's 7 amp, bigger than the 4 amp in the scoot, and terminals on opposite sides. Wish the ground wire was about an inch longer but made it work. Looking back at batteries I see the 4 amp has terminals on opposite side than 7 amp. Plenty of charge out of the box to start the scoot right up. 3. LED 1157 tail light bulb: As reported in the tech section, doesn't seem as bright as the regular bulb. I ride exclusively in daytime and rural areas so think it's OK. I've burned out the regular ones for some reason, hope this is more reliable. The Bando belt is same as I currently have but wanted a spare. |
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Post by adkbiker on Sept 20, 2016 14:14:54 GMT -5
  Today I installed a HOCA performance clutch that I also got from Scrappydog with a yellow contra spring and blue clutch springs. I thought it would be a match for the Koso variator with 6g sliders I installed yesterday. However, the engine revs almost immediately to over 7000 rpm and accelerates slowly. It acts like the clutch is slipping. I rode up the road maybe a quarter mile and back then shut it down. I removed the CVT cover and both the variator and clutch were very hot. I re-installed the stock clutch and it runs fine, great actually. I was thinking that the performance clutch would rev a bit more on takeoff to help acceleration, particularly when starting on a hill. Any thoughts on where my logic has gone wrong? |
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Post by 90GTVert on Sept 20, 2016 14:38:32 GMT -5
You could see what happens when you use the same contra spring that you've been using along with the new clutch, or use heavier rollers to counteract the stiff contra spring. If it still revs too high, but only on takeoff, you could try stock clutch springs in there. I don't feel like aftermarket clutches are a necessity in most cases, so if the stock unit works, keeping that in service is fine too.
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Post by diynuke on Dec 14, 2016 5:04:54 GMT -5
You could see what happens when you use the same contra spring that you've been using along with the new clutch, or use heavier rollers to counteract the stiff contra spring. If it still revs too high, but only on takeoff, you could try stock clutch springs in there. I don't feel like aftermarket clutches are a necessity in most cases, so if the stock unit works, keeping that in service is fine too. But what is the rpm you should aim for ? i thought its about 7,5k to 8k or is that a bit high? / low? |
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Post by 90GTVert on Dec 14, 2016 7:13:24 GMT -5
I don't know that there is a specific RPM. Mine seems to make the most around 7800-8200. That's where I get the best results. Others report keeping revs much lower, but mine will give me better maintained speed if I can keep RPM around there when cruising. Trial and error tuning will show you what your engine likes.
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Post by greggkinney on Dec 16, 2016 1:08:11 GMT -5
You should buy a 50-51mm bbk and put on that kymco bottom and roll  I just got a top racing crank and about the time it came in I ran across an older low mileage agility project (running nicely) for less than the crank. Oh well |
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I just got a top racing crank and about the time it came in I ran across an older low mileage agility project (running nicely) for less than the crank. Oh well