vmeek,
Do not exspect any support for your GR PRO ENGINES. I was a dealer for the GR PRO engines, and I have [2] 100cc twins that the crankshafts failed during testing engines before selling them. Alfonso Wang refuses to service them and I am out $1000.00 for [2] GR PRO 100cc twins. The crankshafts failed after a short test run. The welds that hold the shafts together broke. He said he does not sell that engine anymore so he will not service it. How do you like that for good service. That is one of the reasons for me leaving GR PRO. I hope you do not require sevice on your engines, you will be out of luck.

Larry LS PRO ENGINES