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Post by kuzikood on Sept 26, 2009 20:22:58 GMT -5
ive got a couple extra heads layin around im gonna have to try the motoman smaller high velocity porting one of these days for the heck of it
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Post by Enviromoto on Sept 27, 2009 16:48:22 GMT -5
I would get in on this provided everyone used the same size rim/tire on the rear! shiftless, Can you give the specs on the your 2 valve head? I've done what I can with a ported and milled 2 valve head, got a deal on a 4 valve and there is no comparison at all. The exhaust valve is just to small on a 2 valve head in my opinion. No go. There are to many variables with this proposal and I think its run what you bring. If you know what tire size works best you have a edge over your competition. Once that secrete is out there will be another trick. Thats why I like unlimited options in a unlimited class, it breeds innovation. Its not like were racing 10K motorcycles here guys. Budgets can get strained real quick when racing, and one way to avoid this is to add a few simple resrictions. Classes 100cc and LESS, use a max rim diameter of 10" Classes 100cc and MORE, use a max rim diameter of 13" Then you can get as exotic, or as big as you want, if you can't "hook it up" to the track, what good is it. Remember, in England and most of Europe, Sprint(drag) racing goes on WET or dry track. I like the idea Performance, and second it.
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Post by stradarx150te on Sept 27, 2009 18:58:28 GMT -5
Well I got it running today!! Let me say WOW Power
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Post by kuzikood on Sept 27, 2009 22:06:24 GMT -5
well lets hear some numbas strada get the gps and the stop watch hell a vid of a high speed pass would be cool too !
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Post by Rebel on Sept 28, 2009 12:49:28 GMT -5
OK, now give us a side by side. What did your scooter have before and how does it compare to what it has now. Was your old head ported and polished? if it was who did it, did it have a hot cam or a mild/stock one, what was the displacement before?
I'm just wondering about the four valve design. you can only flow so much air through there and that is determined by the cubic displacement. Obviously four valves have to be smaller than two valves and it may be just so much show and not really much more go than a stock two valve head. to put it in perspective, a one inch hose can flow twice the water of two one half inch hoses. I suspect that the increase in power really comes from the increase in cubic centimeter, and the cam, not the head. More moving parts create friction and rob power if they are not generating more.
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Post by stradarx150te on Sept 28, 2009 21:18:49 GMT -5
I got it running but i still need to put the exhaust on I need to weld the O2 sensor on the header. I need new brakes. But it ran great it was super rich 170 main jet on the flat slide, But i could tell a big improvement over my other scoot witch is a big valve ported head 63mm bore A12 cam stock springs. The four valve head, The valves are smaller about 1/4'' smaller then the exhaust valve But there are two, So really they are way bigger the ports are also bigger Evan if you port your 2 valve head to the max the stock ports are about there and then you can go more on the four valve. So my plains for this build I'm going to call this the Super scoot custom swing arm stretch the rear wheel back about 4'' Put drag bars on for handle bars Putting disk brakes on the back even know everyone thinks drum brakes are faster disk stop better!!! Paint the frame blue the rims red Also I'm might build another motor just for Indy next year lets just say it will be close to 250cc I'll use the 180cc Power pack witch comes stock bored 65mm and i think you can bore it out to 68-69mm also use a 5 to 7mm stroker crank mmmmmmmmmmmm Power!! we will see this winter. here in Michigan there's a lot of time to do stuff in the winter!! homepage.mac.com/limefrog/content/hosting/files/gy6head10-17-2008/gy6head10-17-2008-Pages/Image1.htmlhomepage.mac.com/limefrog/content/hosting/files/gy6head10-17-2008/gy6head10-17-2008-Pages/Image0.htmlNot mine but it shows the valve size!!
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Post by Enviromoto on Sept 29, 2009 9:45:58 GMT -5
Sounds like a plan.
Whats the 02 sensor for? Temp?
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shiftless
Non-Com
SFC Indy, IN, 2nd DIV, So. Symperthisers
Twist n Go !
Posts: 177
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Post by shiftless on Sept 29, 2009 13:26:51 GMT -5
I got it running but i still need to put the exhaust on I need to weld the O2 sensor on the header. I need new brakes. But it ran great it was super rich 170 main jet on the flat slide, But i could tell a big improvement over my other scoot witch is a big valve ported head 63mm bore A12 cam stock springs. The four valve head, The valves are smaller about 1/4'' smaller then the exhaust valve But there are two, So really they are way bigger the ports are also bigger Evan if you port your 2 valve head to the max the stock ports are about there and then you can go more on the four valve. So my plains for this build I'm going to call this the Super scoot custom swing arm stretch the rear wheel back about 4'' Put drag bars on for handle bars Putting disk brakes on the back even know everyone thinks drum brakes are faster disk stop better!!! Paint the frame blue the rims red Also I'm might build another motor just for Indy next year lets just say it will be close to 250cc I'll use the 180cc Power pack witch comes stock bored 65mm and i think you can bore it out to 68-69mm also use a 5 to 7mm stroker crank mmmmmmmmmmmm Power!! we will see this winter. here in Michigan there's a lot of time to do stuff in the winter!! homepage.mac.com/limefrog/content/hosting/files/gy6head10-17-2008/gy6head10-17-2008-Pages/Image1.htmlhomepage.mac.com/limefrog/content/hosting/files/gy6head10-17-2008/gy6head10-17-2008-Pages/Image0.htmlNot mine but it shows the valve size!! Hmmm interesting I imagine the O2 sensor is for easier air fuel mix tuning ??
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Post by stradarx150te on Sept 29, 2009 18:42:39 GMT -5
I got it running but i still need to put the exhaust on I need to weld the O2 sensor on the header. I need new brakes. But it ran great it was super rich 170 main jet on the flat slide, But i could tell a big improvement over my other scoot witch is a big valve ported head 63mm bore A12 cam stock springs. The four valve head, The valves are smaller about 1/4'' smaller then the exhaust valve But there are two, So really they are way bigger the ports are also bigger Evan if you port your 2 valve head to the max the stock ports are about there and then you can go more on the four valve. So my plains for this build I'm going to call this the Super scoot custom swing arm stretch the rear wheel back about 4'' Put drag bars on for handle bars Putting disk brakes on the back even know everyone thinks drum brakes are faster disk stop better!!! Paint the frame blue the rims red Also I'm might build another motor just for Indy next year lets just say it will be close to 250cc I'll use the 180cc Power pack witch comes stock bored 65mm and i think you can bore it out to 68-69mm also use a 5 to 7mm stroker crank mmmmmmmmmmmm Power!! we will see this winter. here in Michigan there's a lot of time to do stuff in the winter!! homepage.mac.com/limefrog/content/hosting/files/gy6head10-17-2008/gy6head10-17-2008-Pages/Image1.htmlhomepage.mac.com/limefrog/content/hosting/files/gy6head10-17-2008/gy6head10-17-2008-Pages/Image0.htmlNot mine but it shows the valve size!! Hmmm interesting I imagine the O2 sensor is for easier air fuel mix tuning ?? Yep that's right
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Post by Rebel on Sept 30, 2009 11:13:48 GMT -5
is this a fuel injected scooter?
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Post by stradarx150te on Oct 1, 2009 20:28:35 GMT -5
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Post by Rebel on Oct 2, 2009 0:22:05 GMT -5
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Post by stradarx150te on Oct 3, 2009 18:53:16 GMT -5
Ok i worked on the scoot today getting it ready for the new handle bars. Im going ruckus style. All the wires in the glove box The Air/fuel cluster lights on, horn, kill,switch,start button still need to do the turn signals Yeah live on a dirt road and it was raining
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Post by kuzikood on Oct 4, 2009 7:43:11 GMT -5
its so much fun intentionally gettin sideways on a dirt/gravel road / driveway on a scoot hehhehehe
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