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Post by oldgeek on Feb 18, 2019 13:01:51 GMT -5
Next up are some more CVT cooling mods. Since the E start will not turn this motor over, nor any other build likely to be on this set of cases I am considering cutting the entire starter portion of the case off, at the general area on the right side of the blue tape. As far as I can tell there is nothing critical or structural in the area of the starter. It would certainly allow air to flow through the CVT better.  Also planning to remove the curved pieces from the CVT cover that are in front of the clutch area.  Why not just remove the starter and push fresh air thru that opening ? Because hacking stuff up is a specialty of mine.  I may scale back and just drill some holes in the front of the starter area, and add some screen to keep big debris out of the CVT. And remove the starter like you suggest. Do you know if any of the aftermarket "heavy duty" starters will actually work on high compression motors? |
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Post by Lucass2T on Feb 18, 2019 13:07:56 GMT -5
Why not just remove the starter and push fresh air thru that opening ? Because hacking stuff up is a specialty of mine. I may scale back and just drill some holes in the front of the starter area, and add some screen to keep big debris out of the CVT. And remove the starter like you suggest. Do you know if any of the aftermarket "heavy duty" starters will actually work on high compression motors? Peugeot has a few 100cc variants of their 50cc models. I know theres a speedfight 100cc and a vivacity 100cc. Those starter components may be beefier/stronger and also plug and play into the kymco cases. |
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Post by oldgeek on Feb 18, 2019 13:16:13 GMT -5
Because hacking stuff up is a specialty of mine. I may scale back and just drill some holes in the front of the starter area, and add some screen to keep big debris out of the CVT. And remove the starter like you suggest. Do you know if any of the aftermarket "heavy duty" starters will actually work on high compression motors? Peugeot has a few 100cc variants of their 50cc models. I know theres a speedfight 100cc and a vivacity 100cc. Those starter components may be beefier/stronger and also plug and play into the kymco cases. Good idea, thanks! I have already been spying on the aftermarket cylinders for the Speedfight 100. I have only seen an Airsal and a Malossi, and they are quite expensive. The stock cylinders are supposed to be 50.6mm with a 49.7mm stroke. Do you happen to know if the stud spacing is the same as the Speedfight 50? |
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Post by 90GTVert on Feb 18, 2019 16:04:19 GMT -5
Brent did graphs on some iggy boxes,couldnt find where they were posted though... Here are curves from a few Minarelli CDIs, stock and cheapo replacements.  You can look up dirt bike curves for an idea of what you may want to try if you get the adjustable CDI. www.dragonfly75.com/motorbike/timingcurves.html |
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Post by Lucass2T on Feb 18, 2019 16:23:07 GMT -5
Peugeot has a few 100cc variants of their 50cc models. I know theres a speedfight 100cc and a vivacity 100cc. Those starter components may be beefier/stronger and also plug and play into the kymco cases. Good idea, thanks! I have already been spying on the aftermarket cylinders for the Speedfight 100. I have only seen an Airsal and a Malossi, and they are quite expensive. The stock cylinders are supposed to be 50.6mm with a 49.7mm stroke. Do you happen to know if the stud spacing is the same as the Speedfight 50? Dunno about the 100cc's stud spacing |
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Post by oldgeek on Feb 22, 2019 13:27:43 GMT -5
Been chipping away at this scoot this week as I attempt to recover from bronchitis. Only able to sneak in a few test rides this week due to the weather being bad. I rode enough to decide the modified Malossi OR is likely not going to work well for high top speeds, the belt does not travel down into the center of the pulley as far as it does on the stock pulley due to design differences so I took it off for now and have gone back to the dual angle stock TD.
After a few carb and weight changes last night I am pretty much back to 58 mph on a short test run. However a new issue has developed. There are just over 50 miles on this motor since I switched to a lower comp head and honed the cylinder. The rings must be seated now because it is nearly impossible to kick start it. It was starting fairly easy with 1 or 2 kicks, but somehow that has ended. As a matter of fact I left the warehouse last night unable to start it, and foot hurting from kicking. I went through the CVT kicker parts to make sure all is ok. It is not helping that the everything is wet due to the rain and I wear tennis shoes. The air filter also gets in the way of things a bit.
I am going to work on getting a high torque starter motor, and or modify the stock setup somehow for more torque. One idea I have is to use a Dewalt 20 volt lithium battery to do nothing but run the starter. I can charge the battery when I get back to the shop in its dewalt charger as necessary.
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Post by 190mech on Feb 22, 2019 15:45:01 GMT -5
We started Snoopy with a cordless drill on the flywheel side,had to rig up a ratchet head between the drill and socket because a kickback would throw the drill out of your hand!  |
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Post by oldgeek on Feb 22, 2019 16:55:31 GMT -5
It took about an hour and a half but I got it running again. Dunno if it was just being moody or what. I traded the CDI, new plug, cap and wire. Hit the cylinder with a lit torch, shot butane in a spare intake port. Held to throttle wide open and kicked it once and it finally roared to life with a puff of smoke.  By the time I got it running it was getting cooler out and there was a very fine mist in the air. I made some big weight changes to the CVT last night and was itching to test it, so I said screw it and went around the longer test loop a couple times. I got back to back 60 mph runs, rpm was @ 9500 - 9600. I noticed something in the CVT gets kinda loud and whining around 60 MPH. I also noticed both tires a little out of balance, that will be a priority to get fixed. |
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Post by ryan_ott on Feb 22, 2019 18:23:44 GMT -5
You could try using larger cables, cleaning the brushes and commutator in the starter and lubing up the e start parts but then you’ll realize it was a waste of time because you’ll still be kick starting it.
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Post by oldgeek on Feb 22, 2019 18:24:59 GMT -5
My gear oil is all sparkley! Not what I was hoping for.  |
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Post by pitobread on Feb 22, 2019 18:46:17 GMT -5
Anything gear metal on metal expect some sparkles. It's kinda inevitable.
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Post by ryan_ott on Feb 22, 2019 18:49:20 GMT -5
The first few changes on fresh gear swaps I seem to get some sparkles, just make sure you have the correct shims and hope for the best.
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Post by oldgeek on Feb 22, 2019 19:40:51 GMT -5
There are about 100 miles on this gearbox since I "fixed" it. But yeah, I am going to run it and see what happens. I doubt it would lock up or anything like that. It would likely get loud before anything like that happens.
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Post by oldgeek on Feb 23, 2019 21:53:34 GMT -5
Refilled the gearbox today and went for a short spin, tried a few more setups for the CVT and the carb. I never could get 60 MPH out of it today, Its just too cold for me to be riding and still recovering from bronchitis. The scoot is running pretty good overall, I played with the air screw for a while and the front tire is easy to get light again. There is a small lean spot just as it gets on the needle but I ordered a couple PHBG needles from treatland that hopefully will help cure that problem. I have not checked exact #'s but gas mileage is pretty bad.
I also broke down and ordered a straight groove pulley half, a Doppler from Scooter Attack. It was a few dollars cheaper than the Malossi, and a few dollars more than the Naraku part. I probably should have just gone with the Malossi since I already have one and like the way it works. I have been using a Dr Pulley variator coupled with a Polini ramp plate and I am overall pleased with its performance. I marked it with the sharpie and I am getting full travel (no marker left) so I dont know what can be done to improve travel much if any. The SEF ramp plates perform better than the Polini, but I realized they are cutting into the top of the sliders at full travel so I switched to the Polini which has a bigger diameter and a different angle than the SEF plates. I have had all kinds of different slider weights in this scoot, from 8.5 grams to 6 grams and everything in between. I am kinda surprised the lighter ones seem to be working better.
I also realized I have been running a 120 tire on the back of this scoot, so I decided to try and get a 130 mounted on my spare Kymco rim to eventually put in place of the 120 currently on this scoot. I cannot believe how much trouble I have mounting tires, specifically getting a tire off of the rim. Putting a tire on is not so bad, but for some reason getting the old tire off is my issue. Anyway I got it on the rim, but I am going to rig up some type of balancer before I actually put it on the scoot.
Tomorrow (Sunday) is supposed to be above 70°+ F but with thundershowers. I hope to get some riding in and possibly a video.
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Post by gsx600racer on Feb 23, 2019 22:34:46 GMT -5
Heat and soap water/tire slime are your best friend.
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