My 1p39qmb Quest for... More... POWER!!!

[lykos23]

Okay, so for some reason this thread was deleted with all my updates on this forum, so I'm reposting it because I have updates and have made progress on my scooter since then and I hope that this thread will some day help someone else get more performance out of their scooter because it should contain a wealth of information by now.

EDIT: Re-titled this post, Blah, blah, blah, scroll down for updates

Hello all.

I'm the one posting about my new Bashan Peace Sports 50 2009 scooter (49.9cc), the first scooter I've ever owned that's street legal.

Currently my top speed is 20mph and there is no full throttle. It takes possibly a solid minute before I can reach 20mph on a flat road too. I'm using a busted up throttle case assembly right now, but I'm positive that's not the issue.

It appears to have a sort of sweet spot at around 75% throttle, but anything higher than that puts it back in idle. What's going on here? As far as I know the carb has never been cleaned and despite having 1.4k miles on it it still had the stock sparkplug and oil (the previous owner must've hated this poor thing). I've since replaced the sparkplug and oil and there's no more dying at stops or bogging during idle, but I still have this issue with the throttle. Is it just normal to not be able to go over a certain throttle percentage? I can't join traffic going 15mph for a minute before I reach the speed of the other cars.

I currently weigh 240lbs, but carrying a 20lbs bag of salt didn't seem to effect performance.

So... I'm sorry for my poor description skills, but what should be done, in your opinion? Is it the carb? The fuel? The idle? The air/fuel ratio? The fuel line? or something I'm unaware of? If at all possible I'm willing to have a go at any possible way to draw more performance out of this thing with some direction. This is my primary and only vehicle, I need it to be able to go just 35mph, not 25 downhill. Is this even possible to achieve? Because right now every car is passing me in the neighborhood on my way to the local grocery store. Main roads are just an impossibility.

Should I sell my precious first scooter and try to get a 150cc or is it possible to draw enough power out of it to go to my optimistic goal of 35mph?


UPDATE 1/19/13
Still working on hitting 35mph, I can go up to 31mph right now, just looking for that last limitation. I got my feeler gauges in the mail today, so I'll be doing a valve adjustment soon.



UPDATE 1/20/13
Finished the valve adjustment, hearing no clicking. Haven't been able to ride for almost a week because of my hurt ankle, but I'm still working on it. Ordered a new battery and now I'm trying to figure out my throttle problem.


UPDATE 1/23/13
Tightened my throttle and it seemed more responsive for the few minutes the scooter would run. Found my old work boots and they have been helping support my ankle, I'm feeling good enough to go for a ride in the chilly weather. I'll be updating again once I get my new battery!

UPDATE 1/24/13
Got the battery yesterday, tried charging it but the light instantly went green so it came fully charged as advertised. Loosened the throttle a bit. Been trying to start the scooter for two days now! Boy, do I regret ever letting it with an empty tank of gas. Heet seems to have made the scooter able to start for a minute at most, but it won't stay running no matter what I do. I'm thinking the cold weather has something to do with it. Or maybe everything to do with it, I'm not sure.


UPDATE 2/3/13
Took off my carb and drilled/chiseled out the plug that was blocking my a/f. Put a #90 jet in there and my throttle dilemma seems solved. Have yet to ride due to bad weather though. I will continue to update this thread as I was updating through the other forum for a while and now some of my progress is lost in history.


UPDATE 2/15/13
Finally got to riding today! After weeks of bad weather. My throttle is great and responsive, I can go full throttle no problem, and I have finally reached my goal of 35mph (up a small hill no less!), I know I can go faster, but I have yet to find a road I'm willing to try to on, haha.

UPDATE 5/23/13
My original thread got deleted so I'm re-posting it from the old scootdawg forum.
I've done a lot since the last update. I've played around with slider weights, restricting my freeflow filter, breaking and then fixing my kickstarter, etc.
I've found a polish village in which to test my speeds on. There's an awesome hill that goes on for about an eighth of a mile which allows me to test my speeds uphill and downhill, while my flat terrain speeds have reached 40mph+ allowing me to join traffic and fully test my limits on the main roads. At 267lbs, the following checklist has allowed my top speed to reach 40mph on a mere 63cc scooter. I now go 50mph downhill, 35mph uphill, and 40mph+ on flat terrain.

UPDATE: 6-7-13
So yesterday I installed my 50mm BBK from Techdirect on amazon. The power is incredible. Takeoff is great. Acceleration is crazy awesome. And the sound of my performance exhaust makes it seem like a big motorcycle, haha. I have yet to break in the head so I have yet to reach WOT yet, but I will be updating with the speeds I can hit.

Things to do:

New Spark Plug - NGK CR7HSA ✔
New-er Iridium Sparkplug - NGK CR7HIX ✔
Change oil-10w-30 ✔
Change Oil At 1000 miles (Castrol GTX 10w40) ✔
Change gear oil 80w-90 ✔
remove cockroach ✔
Install Throttle Case Assembly (the thingy that controls the throttle on the handlebar) ✔
Install New CVT Belt - 669 18 30 ✔
de-restrict (if possible) (no restrictions found) ✔
Install new battery (YTX5L-BS) ✔
P! ✔
Adjust Valves .004 in/out ✔
Adjust Idle ✔
Clean Carb ✔
Adjust A/F ✔
Remove airbox and replace with freeflow filter ✔
Re-Jet main jet - 85 Main Jet ✔
Re-Jet Idle - 38 Pilot Jet ✔
Get new kickstarter ✔
Get new turn signal bulbs (R10W12V-E13-282) ✔
Get High Performance Ignition Coil ✔
Get New Performance CDI - (AC) ✔
Get New CVT Sliders - three 9g and three 4g for a total of 6.5grams to match the stock roller weight of 6.5g ✔
Change Clutch Springs - 2000rpm ✔
Get new V-Slides (139qmb NOT Gy6 150) ✔
Install Big Bore Kit - 81cc✔

Get Performance Exhaust - ✔

Speed Results based on variator weights:
63cc:
(Weight of rider: 267lbs)
4g:
35mph uphill, 33mph GPS

40mph flat terrain, 36mph GPS

45mph downhill, 39mph GPS


Three 4g and three 9g:

32mph uphill, 28mph GPS

40mph flat terrain, 37mph GPS

50mph downhill, 43mph GPS


Six 9g:

30mph up hill, 25mph GPS

40mph flat terrain, 38mph GPS

47mph downhill, 40mph GPS


Three 4g sliders and Three 6.5g rollers:

33mph uphill,

~40mph flat terrain, 37mph GPS

48mph downhill,