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Post by texomaev on Apr 14, 2013 1:20:53 GMT -5
I know this would/will void any possible warranty the Trike has, and most would probably not recommend doing it, but...... Does the 300cc engine/transmission from typical China built scooters have a speed limiting spacer in the CVT and a restriction in the exhaust pipe ? If so, has anyone removed them before to help with overall highway speed of a scooter? I feel comfortable now with this reverse trike at highway speeds with the front end modifications to date, but it's having difficulty maintaining highway speeds of at least 65mph, when climbing small hills, or headwinds. Not looking for 70+ mph, or to make it into a hotrod, just give it a little more ability to maintain up to 65 mph. Photo/Video blog of my Roadrunner 300 Trike: www.flickr.com/photos/mbarkley/sets/72157632501957931/ |
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Post by domindart on Apr 14, 2013 2:03:13 GMT -5
LOVE the alien motif on your Scoot... I had the same alien sticker on my Subaru..  |
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Post by oldbikerider on Apr 14, 2013 3:47:02 GMT -5
I think the speed limiters are only on the 50cc scooters to keep them at 30mph and are not installed on the larger displacement scooters. You might want to tune your CVT, getting the variator roller weights tuned to your riding style might help do what you want.
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Post by texomaev on Apr 14, 2013 12:07:17 GMT -5
Thanks for the heads up, I wasn't looking forward to tearing into the CVT to remove a spacer. I will google how to modify/tweak the CVT weights. Still wonder about the exhaust, maybe even a little larger main jet in the carb ?
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Post by alleyoop on Apr 14, 2013 13:32:20 GMT -5
Going up hills do your RPMS DROP or just the MPH?
A well tuned CVT will hold the RPMS going up hills and the only thing you will loose is some mph due to the weight holding it back, Even a car will do the same thing.
What you need is for the scoot to be able to run at 65 mph and still have some throttle left so that when you do hit the hills at 65 at the bottom you have something left to give it to keep the speed up going up the hill.
So the question about loosing RPMS going up a hill is the key to what can be done to help with what you want it to do.
Alleyoop
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Post by texomaev on Apr 14, 2013 16:40:12 GMT -5
Going up hills do your RPMS DROP or just the MPH? A well tuned CVT will hold the RPMS going up hills and the only thing you will loose is some mph due to the weight holding it back, Even a car will do the same thing. What you need is for the scoot to be able to run at 65 mph and still have some throttle left so that when you do hit the hills at 65 at the bottom you have something left to give it to keep the speed up going up the hill. So the question about loosing RPMS going up a hill is the key to what can be done to help with what you want it to do. Alleyoop Thanks, I will monitor the RPM on a run this upcoming weekend, and get back to the forum. My windshield is supposed to arrive on Tues. and will kill two birds with one stone on the weekend, to see if it defelects enough of the wind blast over my helmet and monitor the RPM as well. |
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Post by texomaev on Apr 14, 2013 19:06:32 GMT -5
Broke free for a few minutes, and took the trike out for a few hill runs. It seems to hold the RPM pretty well, but drops in mph. The max range in RPM seems to be around 5K . Can get up to 5.5K downhill, but that will drop to 5K once starting up a hill, and holds there, yet mph drops. If I don't have a down stretch before hitting hill, 5K, holds and mph drops going up. No throttle left once I hit 5K rpm.
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Post by alleyoop on Apr 14, 2013 20:47:03 GMT -5
WOW!! only 5K rpms max, that is not enough, Check the weights in your VARIATOR and weigh them I bet they are on the heavy side.
You can get more rpms by just going to lighter weights.
Heavier weights will lower your RPMS.
Lighter weights will raise your RPMS.
ROLLERS: For every gram you go up or down from your current weights your RPMS will change by 500-600.
SLIDERS: For every gram you go up or down from your current
weights your RPMS will change by 200-350.
So for example: Currently your max RPMS are 5K:
If your current weights are say 23grams and you get 20gram weights you will pick up 1500 rpms
so now your max rpms will be 6500K.
Just checked the specs on your trike and it makes its max hp at 6500 rpms so your 1500 rpms low.
What you want to do is get weights that will get close to that 6500 rpms range. So if it only is going to 5k you can get 2 and 3 gram lighter weights.
If putting in all say 20 gram weights from 23 and it appears to much you can then put half of the lighter ones and half of the heavier ones to lower the rpms a bit, So they won't go to waste.
Alleyoop
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Post by texomaev on Apr 14, 2013 21:16:25 GMT -5
WOW!! only 5K rpms max, that is not enough, Check the weights in your VARIATOR and weigh them I bet they are on the heavy side. You can get more rpms by just going to lighter weights. Heavier weights will lower your RPMS. Lighter weights will raise your RPMS. ROLLERS: For every gram you go up or down from your current weights your RPMS will change by 500-600. SLIDERS: For every gram you go up or down from your current weights your RPMS will change by 200-350. So for example: Currently your max RPMS are 5K: If your current weights are say 23grams and you get 20gram weights you will pick up 1500 rpms so now your max rpms will be 6500K. Just checked the specs on your trike and it makes its max hp at 6500 rpms so your 1500 rpms low. What you want to do is get weights that will get close to that 6500 rpms range. So if it only is going to 5k you can get 2 and 3 gram lighter weights. If putting in all say 20 gram weights from 23 and it appears to much you can then put half of the lighter ones and half of the heavier ones to lower the rpms a bit, So they won't go to waste. Alleyoop Thanks, Now I will just have to work up the courage to dive this deep into the drive train. Never worked on a CVT system before. |
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Post by alleyoop on Apr 14, 2013 21:36:20 GMT -5
It is very simple and here is a VIDEO of a guy changing his weights in the Variator.
If you have questions just ask and we will help you get through it. Changing weights should not take you longer than 30 minutes you will find taking the CVT Cover off is the time consuming part. Yours may have a grease cover on the back of the Variator but all you do is take the 3 or 4 scres off to pull the cover off and you will see the same thing as any other Variator. Yours may have 8 weights some have 6 weights.
Alleyoop
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Post by texomaev on Apr 14, 2013 23:33:57 GMT -5
Fantastic DIY video. Looking forward to weighing my weights, and ordering new ones. Who is the recommended supplier of such parts, hoping I can patron someone's business who helps out on the forum.
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Post by texomaev on Apr 14, 2013 23:48:27 GMT -5
Pros/Cons of sliding -vs - roller weights?
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Post by alleyoop on Apr 14, 2013 23:48:51 GMT -5
Here is one that is most like yours:
Alleyoop
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..BAD TO THE BONE..