I got one of eBay installed it and it worked perfectly for about 10 seconds. Total waist of money. The thing caught fire sort of. This stuff had a big rap through the Yamaha forums.
So I am on my third KTM and forth rec/reg. I've had my bike since new 6 years. Change my waterpump every 15,000km ... now 20,000km. Fitted a vacuum fuel pump..... and recently fixed my starter sprang spring. That was quite funny as I rang the shop and was quoted $1,080 for the part which includes the freewheel. The broken part looks like a spring from behind an oil seal..... reached into my bag of old unused seals and gaskets and found one that fit...... I works perfect. Cost = $0,000
Easy bike to live with. No other problems