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Post by ital on Jun 26, 2015 22:05:56 GMT -5
I put the air filter cover back on and the scooter runs a lot better does not feel as lean anymore. It seems that the intake manifold spacer that bolts to the head is really limiting fuel.
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Post by ital on Jun 27, 2015 0:19:31 GMT -5
I have some exiting news to share. One of my buddies works at a tuning shop and he just bought a Honda Grom so together with another friend we been riding together every now and then. Anyway he is putting together a scooter tuning session for us so we can get the most out of our scooters, We are going to hook them up to the dyno and read air to fuel ratios as well. scooter #1 (mine) has ncy 61mm bbk with ncy 30mm carb and a9 camshaft plus exhaust and uni filter scooter #2 has no bbk, but bored out head, exhaust and intake manifold all bored out to match and A12 or A11 camshaft Groom #3 still mostly stock with after market exhaust only Its going to be a fun night it is probably going to happen in the next couple of weeks. Stay tune for updates   |
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Post by JoeyBee on Jun 27, 2015 2:29:13 GMT -5
That is great news. Don't forget to update us with the results. I'm sure a lot of us here would be interested in the data you get.
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Post by geh3333 on Jun 27, 2015 5:50:15 GMT -5
I have some exiting news to share. One of my buddies works at a tuning shop and he just bought a Honda Grom so together with another friend we been riding together every now and then. Anyway he is putting together a scooter tuning session for us so we can get the most out of our scooters, We are going to hook them up to the dyno and read air to fuel ratios as well. scooter #1 (mine) has ncy 61mm bbk with ncy 30mm carb and a9 camshaft plus exhaust and uni filter scooter #2 has no bbk, but bored out head, exhaust and intake manifold all bored out to match and A12 or A11 camshaft Groom #3 still mostly stock with after market exhaust only Its going to be a fun night it is probably going to happen in the next couple of weeks. Stay tune for updates There is nothing like true numbers !! |
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Post by ital on Jun 28, 2015 21:33:54 GMT -5
Hi All, I messed around with the scooters a bit today, and I ended up putting a bigger jet in (130 from 128) and it feels perfect. I even tried a 140 main jet but it felt way too rich. I'll have to buy a 135 jet.
I think i definitely need gears, and I need some suggestions. My buddy thinks my scooter has enough torque to pull the 16x38 gears. Please keep in mind my scooter is a retro looking scooter (like a vespa) on 10 tinny inch wheels.
should I try the 16x38 or 15x38?
Also I need a new rear tire after about 4k miles, is there anything out there that would last a bit longer? Am I correct to think that do gears the rear wheel has to come off pretty much?
Thank you - Luigi
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Post by geh3333 on Jun 28, 2015 23:12:54 GMT -5
Hi All, I messed around with the scooters a bit today, and I ended up putting a bigger jet in (130 from 128) and it feels perfect. I even tried a 140 main jet but it felt way too rich. I'll have to buy a 135 jet. I think i definitely need gears, and I need some suggestions. My buddy thinks my scooter has enough torque to pull the 16x38 gears. Please keep in mind my scooter is a retro looking scooter (like a vespa) on 10 tinny inch wheels. should I try the 16x38 or 15x38? Also I need a new rear tire after about 4k miles, is there anything out there that would last a bit longer? Am I correct to think that do gears the rear wheel has to come off pretty much? Thank you - Luigi I'd go with the 15:38 . remember you want to be able to get full climb on the variator at around 7500 rpms . basically the taller you go with the gears , the lighter the roller weights you will need to reach 7500 rpms. If you go too tall , you will need too light of weights and the variator all not pull the belt up fully. You may be able to get away with using the taller gears. The only thing you can do is try them out. |
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Post by ital on Jun 29, 2015 10:56:55 GMT -5
i was thinking 16x38, it is tempting, but I will stick to your suggestion and go with 15x38. Man my belt broke again after 2k miles, grrr maybe its over stretching? my scooter uses a Gates Powerlink Premium Belt 743-20-30 i guess I will have to change it every couple of oil changes  |
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Post by ital on Jun 29, 2015 11:56:42 GMT -5
geh3333 not sure if I am reading the marks correctly on my variator but it looks to me that the belt actually climb over it? wow, must be really making power  I guess gears are needed bad. I need the pro to advise  Thanks
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Post by geh3333 on Jun 29, 2015 14:31:31 GMT -5
geh3333 not sure if I am reading the marks correctly on my variator but it looks to me that the belt actually climb over it? wow, must be really making power I guess gears are needed bad. I need the pro to advise Thanks Is that a stock variator ? The black lines are not good, it usually means the belt is slipping, but yeah , it looks as if the belt maybe climbing up and over the edge of the variator. If its stock , you will need to get a 115mm variator. |
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Post by geh3333 on Jun 29, 2015 14:33:59 GMT -5
The more I look at it , it seems like you have about 1/8 inch or so of untouched variator near the edge. But I'm not sure y there would be black marks over the edge.
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Post by geh3333 on Jun 29, 2015 14:42:06 GMT -5
The easiest way to find out for sure is to use a sharpie , and make a mark at he edge of the variator . maybe a 1 inch by 1 inch square at the edge. When you check the mark after a top speed run , you will be able to tell how high the belt climbed. The belt will remove the sharpie mark , so if there is any left , you know the belt didn't climb that high.
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Post by ital on Jul 2, 2015 23:32:51 GMT -5
Hi All, since I need to take my variator apart I figure I would do gears. Anyway I opened up the gear case to see what I am looking at and when I count the gears i am counting 13/39. I thought stock was 14/40 or am I counting wrong?   |
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Post by ital on Jul 9, 2015 9:55:20 GMT -5
Hi All, just want to post an update. I replaced the rear tire which I went from 3.50 -10 to a 100/  10, which is about 1cm wider and 1mm taller. Man I am glad i did not go any more aggressive as it was a very tight fit, but worked perfect. My variator belt broke again so I figure while I was at it I would replaced the gears as well. I took my time and cleaned the whole transmission nicely and out in a brand new variator and weights and replaced the gears. I went from 13\40 to 16\38 (hoca) I got her all back together last night and I went for a very short drive as I want to make sure it does not break down on me or anything, but I was very very impressed with the results. She felt faster on acceleration and on my 1/2 mile test drive it hit 65 CMPH easily. I plan to do more extensive driving this week-end and I hope she can keep on being reliable. I did not change variator weights I will keep it on 12 grams and keep rpm lower. It was dark and could not see rpm, but she felt very fast, even at 50 CMPH, when I floored it I felt a nice pull. |
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Post by geh3333 on Jul 9, 2015 16:43:42 GMT -5
Hi All, just want to post an update. I replaced the rear tire which I went from 3.50 -10 to a 100/ 10, which is about 1cm wider and 1mm taller. Man I am glad i did not go any more aggressive as it was a very tight fit, but worked perfect. My variator belt broke again so I figure while I was at it I would replaced the gears as well. I took my time and cleaned the whole transmission nicely and out in a brand new variator and weights and replaced the gears. I went from 13\40 to 16\38 (hoca) I got her all back together last night and I went for a very short drive as I want to make sure it does not break down on me or anything, but I was very very impressed with the results. She felt faster on acceleration and on my 1/2 mile test drive it hit 65 CMPH easily. I plan to do more extensive driving this week-end and I hope she can keep on being reliable. I did not change variator weights I will keep it on 12 grams and keep rpm lower. It was dark and could not see rpm, but she felt very fast, even at 50 CMPH, when I floored it I felt a nice pull. You should do a GPS run for us just to get the true mph. I'd be concerned that the belt keeps breaking. A gates belt should not break no where near 2k miles. Those black marks mean the belt is slipping and causing excessive heat. This is why the belts are breaking. You will Need to find the reason the belt is slipping. How do the three plastic v-side guides in the variatior look ? |
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Post by ital on Jul 9, 2015 19:49:14 GMT -5
Went for a quick ride today my rpm still feel high after gears changed still at 8k rpm.. Is that normal? I thought they would drop some. Put new variator in with everything new. I have 12grams rollers. Considering getting 13gram Dr pulley rollers
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10, which is about 1cm wider and 1mm taller. Man I am glad i did not go any more aggressive as it was a very tight fit, but worked perfect.