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Post by geh3333 on May 2, 2015 6:47:58 GMT -5
What speeds were you reaching? My speedometer goes from 55 to 60 mph on flats. Slight down hills 70mph, what was interesting rpms were not climbing much they seemed to peak around 7700 rpm but speeds kept climbing. My speedometer seems to be as accurate as any car still off for sure but I do not think it is off more then 3mph When your scoot is tinned with heavier weights you tend to gain a lot of mph down hill. For instance , my scoot is gunned so I can reach 7500 rpms on a straight run . my mph is 67, and going down small inclines I gain between 3-5 mph. If I were to install heavier weights , this would slow my mph and rpms down . let's say on a straight run I'm topping out at 55mph and at 6500 rpms . when I would hit an incline I would pick up quite a bit more mph then with the lihter weights . my rpms will more than likely go over 7000 rpms and the belt will be much higher on the variator due to the heavier weights . there is a good chance I'd pick up between 7-10 mph Considering my scoot is just about topped out on a straight run , when I hit a downhill slope , my scoot doesn't have much room to pick up more speed. |
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Post by retrobrian on May 3, 2015 11:17:40 GMT -5
 Looks like we have similar scoots. I installed this Tach about a year ago. Works great! |
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Post by ital on May 3, 2015 20:23:32 GMT -5
Looks like we have similar scoots. I installed this Tach about a year ago. Works great! we do indeed. What do you have? mine is a Puma Valentine 150cc soon to be 171 :-) |
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Break in done.
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Post by retrobrian on May 4, 2015 8:29:31 GMT -5
Mine is the BMS Chelsea 150
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Post by ital on May 13, 2015 8:55:56 GMT -5
geh3333 Just wanted to give you guys an update. I went from 12 Grams hoca rollers to 11 Grams DR Pulley sliders. Before - 12 grams rollers Hill climbing 6400 to 6500 Flats - 7k too 7400 down hills - highest seen 7950 After - 11 Grams Sliders Hill Climbing - 7200 rmp Flats - 7500 to 7700 Down hills - 8400 is the highest I seen Performance? It does feel a bit faster on take off, but it felt slower top speed, but that was not the case. I actually picked up quite a bit of acceleration and maybe 1 mph top speed I have a friend with a scooter as well and he has been killing with his 150, now we are evenly matched. Hope this info helps other, however now I do not know if I need to worry about my RPM being too high? I use very good oil and all (5w 50 synthetic) and change it every 1k miles, which is like every 1.5 months is summer months
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Post by JoeyBee on May 13, 2015 9:14:46 GMT -5
I think taking the engine above 8000 RPMs is a little dangerous. I tuned my CVT to max out at 7500.
Yes your friend my slightly quicker than you, but he will be broken down much quicker.
Maybe instead of trying to match him with RPMs, install a BBK without telling him.
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Post by lain on May 13, 2015 10:25:34 GMT -5
I think taking the engine above 8000 RPMs is a little dangerous. I tuned my CVT to max out at 7500. Yes your friend my slightly quicker than you, but he will be broken down much quicker. Maybe instead of trying to match him with RPMs, install a BBK without telling him. I had put in lighter weights the other day to try stuff out, got up to 9k rpm on a level street, and 10k downhill. There is no added power over like 8k though, so there's no point. I of course switched back to my 6.66g weights and only get up to about 7500 max, but that's the highest rpm that will give out useful torque and horsepower. |
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Post by ital on May 13, 2015 10:30:56 GMT -5
I think taking the engine above 8000 RPMs is a little dangerous. I tuned my CVT to max out at 7500. Yes your friend my slightly quicker than you, but he will be broken down much quicker. Maybe instead of trying to match him with RPMs, install a BBK without telling him. I had put in lighter weights the other day to try stuff out, got up to 9k rpm on a level street, and 10k downhill. There is no added power over like 8k though, so there's no point. I of course switched back to my 6.66g weights and only get up to about 7500 max, but that's the highest rpm that will give out useful torque and horsepower. Yes BBK is next on the list, however even if using NCY 61MM BBK and heads would it be just as reliable? I drive a good 3k Miles each summer, for an hour at the time. |
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Post by lain on May 13, 2015 11:22:40 GMT -5
I had put in lighter weights the other day to try stuff out, got up to 9k rpm on a level street, and 10k downhill. There is no added power over like 8k though, so there's no point. I of course switched back to my 6.66g weights and only get up to about 7500 max, but that's the highest rpm that will give out useful torque and horsepower. Yes BBK is next on the list, however even if using NCY 61MM BBK and heads would it be just as reliable? I drive a good 3k Miles each summer, for an hour at the time. I've never had issues running all day with a cheap chinese BBK, but I honestly wouldn't take it further than I can push it. That's just me though, tons of other people would. |
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Post by ital on May 13, 2015 12:17:49 GMT -5
lol on nice days I drive to work, 35 miles each way, with many areas of WOT  |
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Post by geh3333 on May 13, 2015 15:24:39 GMT -5
geh3333 Just wanted to give you guys an update. I went from 12 Grams hoca rollers to 11 Grams DR Pulley sliders. Before - 12 grams rollers Hill climbing 6400 to 6500 Flats - 7k too 7400 down hills - highest seen 7950 After - 11 Grams Sliders Hill Climbing - 7200 rmp Flats - 7500 to 7700 Down hills - 8400 is the highest I seen Performance? It does feel a bit faster on take off, but it felt slower top speed, but that was not the case. I actually picked up quite a bit of acceleration and maybe 1 mph top speed I have a friend with a scooter as well and he has been killing with his 150, now we are evenly matched. Hope this info helps other, however now I do not know if I need to worry about my RPM being too high? I use very good oil and all (5w 50 synthetic) and change it every 1k miles, which is like every 1.5 months is summer months Did You pick up the mph on the straight runs ? Personally I don't like to break the 8000 rpm mark. Even in my video when I hit 76 downhill , I wasn't over 8000 rpms. Its hard to achieve those numbers with many of the variator being sold out there . if I were you I would like to at least try a mixture of 11 and 12 gram rollers to see how 11.5 works out. You may get the same if not a higher top end with lower rpms. |
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Post by ital on May 13, 2015 20:41:11 GMT -5
geh3333 I think that is a good idea, however my 12 grams are rollers and my 11 grams are sliders. Not sure if I can mix them up Also on the way home from work my RPM went higher, I was hitting now 8100 rpm on flats... i backed off though. I'll have to try to take the variator out and make sure nothing shifted. Maybe i'll just order a set of 11 grams hoca rollers and mix them
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Post by jerseyboy on May 13, 2015 20:51:08 GMT -5
I just put one of those mini tachs on my lawn mower,,it came with a book that told you how to set it up for different firing sequences. Im pretty sure the GY6 4 stroke fires every revolution even on the exhaust stroke,,heck the flywheel sends a signal to the CDI every revolution right,,that gives us a wasted spark on exhaust stroke..but its still an RPM even though its not firing  |
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Post by geh3333 on May 13, 2015 22:37:44 GMT -5
geh3333 I think that is a good idea, however my 12 grams are rollers and my 11 grams are sliders. Not sure if I can mix them up Also on the way home from work my RPM went higher, I was hitting now 8100 rpm on flats... i backed off though. I'll have to try to take the variator out and make sure nothing shifted. Maybe i'll just order a set of 11 grams hoca rollers and mix them That's a good idea , def get a set of 11 gram rollers if you can . you def don't want to hit that high on a straight run . |
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Post by ital on May 14, 2015 0:05:45 GMT -5
They do sell 11.5 dr pulley rollers or sliders. I just don't understand why 1 gram would make my rpm climb by 1k? Do 11 gram slider vs 11 gram roller yield same rpm? Or slider cause higher rpm?
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