They have expanded their selection. I haven’t heard of any performance results from people in Ontario who have purchased products from them.
I have a Mod 30 with a shaved stock head and an 70CES with an original 70CES head. Last year Kevi was able to modify a stock 70 hp cylinder head to achieve 150 lbs compression. That cylinder head ran last summer with no problems and did improve the performance of the stock 70 Yamaha.
I know for a billet head for the OMC 56 that will be tested this summer. It could be on the market this year and would be sold in Ontario.
https://tsrproducts.com.au/collections/yamaha
