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Originally posted by wilf 853 kit on its own, i.e. not done as part of a service, is about £1200 fitted/set up, inc gaskets, dyno runs etc. etc. if you dont have an adjustable chip (FIM Ultimap) or power commander then you'll need one too. IMO, 853R is a mega conversion, i love em! the peak horsepower figure is only up by 5-8 bhp usually, but the area under the graph is much better, more mid range, typically the power you get at 10k on the 748 you get at 8k on the 853 and it holds it until 10k, so when you change up you don't get so much of a power drop, it feels great to ride. The revy 748 but with more punch out of corners. 748 R is the best model for the conversion but you need to use high compression pistons, the 748 R pistons have large crowns and the valves are set back in the head to suit (748R has a larger cylinder head volume than the other 748 models) Increasing the bore size increases the compression ratio anyway but with flat top pistons you would lose out on a lot. |
Hey Wilf
Who did your all your engine work and setup.
It sounds like you have done exactly what I am looking to do. Are you pleased with the results? Do you have any Dyno runs you can post / pics?