Where can a get a crank trued for a china girl motorized bicycle??
- Thread starter kyle5647
- Start date
Re: Where can a get a crank trued for a china girl??
Get with the guys at Dax and they might be able to tell you if their Gen IV balanced crank & rod assembly will work with your engine. For $24.99 + S&H, you might come out ahead better than trying to ship your own pieces back & forth plus labor. Dax has a good reputation for high quality parts and great customer service. You can see what I'm talking about on the bottom of their Parts Page 1. HTH, Kk
Get with the guys at Dax and they might be able to tell you if their Gen IV balanced crank & rod assembly will work with your engine. For $24.99 + S&H, you might come out ahead better than trying to ship your own pieces back & forth plus labor. Dax has a good reputation for high quality parts and great customer service. You can see what I'm talking about on the bottom of their Parts Page 1. HTH, Kk
Re: Where can a get a crank trued for a china girl??
Any full service motorcycle machine shop CAN do it, but very few will.
Dax has a good rep and you can't touch the price compared to machine shop labor rates...
I'd go with the Dax unless you can do it yourself.
I would tend to agree with knock knock. Truing cranks is a very specialised art and it's hard to find someone who will do it right.
Any full service motorcycle machine shop CAN do it, but very few will.
Dax has a good rep and you can't touch the price compared to machine shop labor rates...
I'd go with the Dax unless you can do it yourself.
Re: Where can a get a crank trued for a china girl??
Does DAX have balanced cranks for 66cc GT-5 type motors 38mm stroke?
Does DAX have balanced cranks for 66cc GT-5 type motors 38mm stroke?
Re: Where can a get a crank trued for a china girl??
Any machine shop could true a set of wheels and do a static balance.
Dynamic balancing would require a specialized shop. Pricey !
As said above, DAX is probably your best bet.
rc
Any machine shop could true a set of wheels and do a static balance.
Dynamic balancing would require a specialized shop. Pricey !
As said above, DAX is probably your best bet.
rc
Re: Where can a get a crank trued for a china girl??
You can true and balance a crank with some machinists vee blocks on pedestals, a shop press for the truing (they're often pressed together badly and bent from the factory), and a digital gram scale. There are some good online writeups for static balancing a two stroke rotating assembly, by putting the trued crank on the vee blocks and carefully weighing parts of it and using counter weights to test crank weight balance with the piston removed. After doing some math and geometry you will know where you need to take off some material to statically balance the whole reciprocating assembly, dynamic balancing is really involved and would cost 20x what you paid for the engine so I don't think its worth it, it's more useful for tuning out harmonics on high RPM racing engines.
You can true and balance a crank with some machinists vee blocks on pedestals, a shop press for the truing (they're often pressed together badly and bent from the factory), and a digital gram scale. There are some good online writeups for static balancing a two stroke rotating assembly, by putting the trued crank on the vee blocks and carefully weighing parts of it and using counter weights to test crank weight balance with the piston removed. After doing some math and geometry you will know where you need to take off some material to statically balance the whole reciprocating assembly, dynamic balancing is really involved and would cost 20x what you paid for the engine so I don't think its worth it, it's more useful for tuning out harmonics on high RPM racing engines.
