A good friend of me will build up this winter a motor for his "Track-TRX" and he expect nearly 115 HP...
He can expect what he wants. Getting it is a different matter
Based upon my experience (which is broadly confirmed by previous engines and other bikes on the same dyno), getting a TRX to the 100 bhp mark is a lot of work and expensive.
Mine (virtually identical spec to Honks) has FCR41, kent cams, 878 high comp pistons, gas flowed, ported and skimmed head and a modified CDI (not forgetting about £1000 of exhaust tested on the dyno for optimum power) just creeps over the hundred mark. All my work has been done on the same dyno and I have charts showing the gains made from a virtually stock motor - Honks TRX has been on the same dyno and makes give or take the same. This has further been cross referenced with Trixynuts bike which makes 90 (and would make a 100 with big bore kit and cams).
So I am very sceptical (and yes it is scepticism and not jaelousy) of claims of 109bhp (111ps). This is 7bhp more than mine (ok his has corrillo rods which are marginally lighter but he has made no mention of porting etc.) I know different dynos make different figures but even so, this is a big difference.
To make 115bhp is gonna be hard. Essentially he will be looking to make 15bhp more than mine with not a lot of options. Essentially, left to go is balancing and lightening the crank, titanium con rods (if you can get them), knife edgeing and polishing.
I'm still amazed Over managed it and don't believe it will be replicated.
That said, can you get him to post on here - I would love to find out how he gets on and what work he has done.