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Post by geoffh on Oct 4, 2019 14:54:01 GMT -5
Kenho,I don't,t know many European scoot users but I run premix I am a victim of pump failure,I just pre measure the oil into a small soda(4oz )bottle and just pour it in at the pump then then add the required amount of gas,that front storage looks just the ticket for 6 small bottles.
Geoff (Great Britain still in Europe till the 31st)
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mattyslimz
Scoot Enthusiast
Posts: 222
Location: Northern Virginia
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Post by mattyslimz on Oct 4, 2019 20:18:55 GMT -5
Pitobread nailed it and has much more high performance scoot building experience than myself, still learning as I go too. The stock crank is an LPC. The big benefits I see in these high end cranks is the design, for instance the connecting rod has a passage for lubrication to the big bearing whereas the stocker doesn’t have that little slit in it.
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Post by Kenho21 on Oct 5, 2019 9:11:53 GMT -5
A heavier crank doesnt mean less torque. It would increase "torque" as it would give more flywheel effect (storage of energy via mass). But really it's a bad use of term as it doesn't increase or decrease torque. It simply changes how that torque is applied. Light stuff = more zingy. Heavy stuff = more luggy A heavier crank will help you carry speed a lighter one will get speed faster. Then there is the whole HPC thing. HPC is kinda a buzzword that gets thrown around a lot. Shoot, even I thought it was good for a while. But there is a magic ratio of crankcase compression. Everything above and below that is not ideal. And it's not just throw a HPC crank in and boom you got the ratio. Everything from transfer ports to piston to reed valve play into that number. From guys much smarter than I they say the only true way to figure it out is to cc the entire engine as a whole. What increasing primary compression does do though is much like heavier weight of crank, can change where the powerband comes on. And in some cases on some setups that's desirable. In others, not ideal. What does all that mean? Pick an affordable quality crank and dont get too caught up in the rest. Well that makes sense too. Same result, but for a different reason. I like understanding the theory behind things.
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Post by Kenho21 on Oct 5, 2019 9:12:55 GMT -5
Kenho,I don't,t know many European scoot users but I run premix I am a victim of pump failure,I just pre measure the oil into a small soda(4oz )bottle and just pour it in at the pump then then add the required amount of gas,that front storage looks just the ticket for 6 small bottles. Geoff (Great Britain still in Europe till the 31st) I ride around with pre-measured bottles now, it’s just a pain. Was your pump cable or vacuum operated? How did it fail?
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Post by Kenho21 on Oct 5, 2019 9:16:07 GMT -5
Pitobread nailed it and has much more high performance scoot building experience than myself, still learning as I go too. The stock crank is an LPC. The big benefits I see in these high end cranks is the design, for instance the connecting rod has a passage for lubrication to the big bearing whereas the stocker doesn’t have that little slit in it. I agree. The design definitely seems more well thought out and even if it doesn’t do squat, I’ll enjoy the placebo effect. Like I said before, I don’t mind paying for peace of mind, especially when it comes to parts that are hard to get to, like anything inside the cases. I throw on a decent amount of Chinese made parts too, but that’s part of the art of scooter building haha. You have to know where to put your money and where you can get away with skimping a little!
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Post by Kenho21 on Oct 5, 2019 10:07:30 GMT -5
So, I will be installing a 70cc SSP-G (Hoca) kit to begin with, but eventually transitioning to a Polini Sport or Corsa down the road and am torn between a 19mm and 21mm carb. Suggestions, insight?
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Post by pitobread on Oct 5, 2019 10:56:18 GMT -5
19. Smaller is better for driveability and fuel consumption. The power difference will be almost neglegablenat that level.
A 21 on a mid kit will be hard to tune on the low end and be fuel hungry.
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Post by Kenho21 on Oct 5, 2019 14:36:31 GMT -5
19. Smaller is better for driveability and fuel consumption. The power difference will be almost neglegablenat that level. A 21 on a mid kit will be hard to tune on the low end and be fuel hungry. Thanks for that. I was leaning toward the 21 just because bigger is always better haha. Was worried about fuel consumption though and I’m not trying to make tons of power. Just want something practical as a daily driver that’ll keep up with traffic well, so fuel consumption should be priority over power for me. A 70cc of any type with taller gears should be more than sufficient for the area I’ll be driving in and around. Speaking of gears... since I just want a little more top end speed, I was going to keep the stock primary gears and swap in some secondary gears around 15-20% taller than stock. Does that sound right? I’ve never messed with primary or secondary bearing on a scoot before either...
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Post by geoffh on Oct 6, 2019 9:36:56 GMT -5
Kenho,I don't,t know many European scoot users but I run premix I am a victim of pump failure,I just pre measure the oil into a small soda(4oz )bottle and just pour it in at the pump then then add the required amount of gas,that front storage looks just the ticket for 6 small bottles. Geoff (Great Britain still in Europe till the 31st) I ride around with pre-measured bottles now, it’s just a pain. Was your pump cable or vacuum operated? How did it fail? My pump is driven by a gear off the crank,to be fair its a mystery failure,soft sieze I blamed the delivery pipe,you can get upgraded oil pumps here in Europe so that may be the route for you. Geof
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Post by Kenho21 on Oct 14, 2019 21:38:43 GMT -5
Change of plans, sold it and bought a Zuma hahaha. Zuma build thread will probably be appearing soon!
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