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Post by moofus02 on Dec 24, 2015 16:51:33 GMT -5
2006 tgb r50x Primary 15/50or Secondary 10/35 Final 11.67:1 That's if my math is right. I have the teeth count And final drive ratio of the other tgb Transmission, but I'm not sure of the model. Might be a 303 laser Or something. Ratio was 13.95:1 though. Thats a lot better ratio than the tgb in the driveway I checked. Didn't do a gear count just turned the clutch and counted till I got on rev on the wheel. Mine was 15:1 |
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Post by triesandluth on Dec 24, 2015 17:18:42 GMT -5
2006 tgb r50x Primary 15/50or Secondary 10/35 Final 11.67:1 That's if my math is right. I have the teeth count And final drive ratio of the other tgb Transmission, but I'm not sure of the model. Might be a 303 laser Or something. Ratio was 13.95:1 though. Thats a lot better ratio than the tgb in the driveway I checked. Didn't do a gear count just turned the clutch and counted till I got on rev on the wheel. Mine was 15:1 I was getting a high count on the 14:1 when I did it on the wheel. I also got a higher count on the 11.6:1 setup by wheel count, but found different by the teeth. |
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Post by 190mech on Dec 24, 2015 19:20:52 GMT -5
I have a TGB motor in the garage,counted out to 15:1,think the Delivery 50 had that..Wish it was around 12 to 1!!
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Post by moofus02 on Dec 24, 2015 19:34:11 GMT -5
The ones I have are handsome boy style. The guy got 3 and rubbed one togather and left the other 2 here for 2 years now. He had a spree with the single speed chain set up that was faster than the tgb but the tgb went like hell up to about 30 mph lol
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Dec 26, 2015 4:54:31 GMT -5
Longjia LJ50QT-H / Vmoto Monza 2 / Grido has a stock 13.79 final drive
Malossi Gears dropped it down to 10.5 final drive after machining to fit
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Post by 90GTVert on Dec 26, 2015 8:14:45 GMT -5
Thanks.
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Post by joeorange on Jan 16, 2016 9:29:40 GMT -5
my scoot has a 13.8/1 final ratio as well, and i can reach 80km/h at 9600 rpm. mind ya that was with the stock 50cc cylinder, and crank. my autotech BBK got me up to 86km/h at around 9800rpm, but it is really sketchy with the stock crank in, ill have to wait until i get my new Doppler Endurance Crank installed to see what i get out of the autotech and my new S6 streetrace kit. ill probably have to get new gears, because i have a feeling that as soon as i give it some throttle, the front end will lift up on me, and im not a fan of wheelies.
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Post by sublunacy on Jan 16, 2016 12:20:16 GMT -5
torque does not exist with high primary compression at any rpm. only when the blowdown and backpressure has realeased the primary compression does it make torque and there for hp. everyone has some crazey ideas about it and the only thing that is correct is me when i say that juggling port area and case volume has an effect port timing. mostly people are doing it ass backwards and totaly wrong when they suggest full circle cranks on cylinders. i am going to start a thread tmrw explaining it further so that nobody gets confused ever again.
ps i have a doppler endurance crank aswell but im not using it on my tpr 70cc AC and it will blow the doors off a stage6 r1200 fully built engine.
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Post by niz76 on Jan 16, 2016 12:41:59 GMT -5
torque does not exist with high primary compression at any rpm. only when the blowdown and backpressure has realeased the primary compression does it make torque and there for hp. everyone has some crazey ideas about it and the only thing that is correct is me when i say that juggling port area and case volume has an effect port timing. mostly people are doing it ass backwards and totaly wrong when they suggest full circle cranks on cylinders. i am going to start a thread tmrw explaining it further so that nobody gets confused ever again. ps i have a doppler endurance crank aswell but im not using it on my tpr 70cc AC and it will blow the doors off a stage6 r1200 fully built engine. Sub, if you have some info about the whole primary compression, stuffer crank subject- that's great! There doesn't really seem to be much info out there about the subject, and as you can see by this thread, we have questions! 49ccscoot.proboards.com/thread/14468/regarding-stuffing-primary-compression-scaveng |
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Post by sublunacy on Jan 16, 2016 13:30:44 GMT -5
"when the blowdown and backpressure has realeased the primary compression." i was listening to others for 6 months and i just unlocked the code two days ago. i need my time to explain it correctly but the evidence is easy to reference. like this statement i quoted of myself above is questionable about being correct. my morning coffee brain is struggling to keep up. |
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Post by sublunacy on Jan 16, 2016 13:44:41 GMT -5
i think tmrw i will start a thread and begin with only dyno reference and transfer port area. thats the easy stuff. when that is over we can try to discuss how and why it works exactly.
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Post by sublunacy on Jan 16, 2016 14:05:40 GMT -5
yea yea yea that was wrong. what i think is happening is this- if you raise the primary compression charge exiting the transfers at the downstroke- you lose more of the intake charge out the exhaust untill the backpressure in the exhaust builds up from high rpm.
there is also pumping loss from increased primary compression. due to the force pushing back on the piston.
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Post by sublunacy on Jan 16, 2016 14:06:57 GMT -5
ding ding- bells ringing
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Post by ohhbuddy on Jan 26, 2016 0:10:45 GMT -5
2003 Kymco super 9 lc 11.5:1
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erglisg
Scoot Member
Posts: 58 
Location: Riga, Latvia
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Post by erglisg on Jan 27, 2016 14:30:51 GMT -5
Piaggio Zip with Polini primary 15/38 and secondary 14/48 8,67:1, quite tall ratio to make better use of hiend engines power.
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