Well its been a while since I've updated this thread!
Went to the practical sportsbikes trackday at cadwell at the end of April:
(Picture stolen from the diffrent strokers site, hope you don't mind Tim)
Had a really good day but the bike nipped up on me at the end of park straight. Grabbed the clutch quick and it turns out damage was minimal, you can just see where the rings dug in on both bores, very lightly picked up.
Since then I'm re-jigging the top end and uprating the cooling system, whipped the engine out last saturday and brought it back to uni with me so I could work on it in my living room
![Very Happy :D](./images/smilies/icon_biggrin.gif)
(not the worst thing I've done, once spray painted a full set of fairings in my bedroom lol, the overspray was a bit of a problem haha)
Heres the yfz450 rad i bought off ebay uk:
82 quid posted so pretty pleased really.
Mj sent me some stuffers for the reed blocks which i've modified today to fit the 35mm inlet manifolds, thanks again MJ!
I've sent my cylinders off to get the KIPS ports widened and raised and also the PV's blending into the KIPS tunnels a bit better than I was able to do with the dremel.
In the mean time I've been looking at the head that was on the bike:
It has been worked in the past and has been skimmed so that the edge of the squishband is flush with the face of the head, it is not recessed in any way.
The fitted clearance volume is 9cc which gives 8.25:1 CCR (26.5mm from top of exhaust port to TDC) and 14.85:1 uncorrected which for me running on 95 RON I think its a bit high really and may be helping to cause my early rpm peak.
I'm going to increase the head volume to give 10cc fitted clearance volume which equates to 7.53:1 CCR (a touch more than stock) and 13.46 uncorrected which will be fine for running 95 ron fuel.
Squish as the bike was set up was a bit crap to be honest, the squish angle was not suitable for the piston as the squish clearance increased the closer you got to the centre of the bore which will reduce squish velocity which won't have been helping matters either I don't think.
I'll aim for a .8mm squish with a suitable angle to match the new vertex pistons I am going to fit.
Dan