Sketchy (Stink Racing's Chief Test Rider and Chief Mechanical Director) has been advising the mechanic (Skunk) on tuning the ZX1R . It's sounding cleaner and crisper with a better throttle response already. A speed test is yet to be done but the team is finally heading in the right direction. Lead rider Skunk was heard to comment how much better the team has been since Sketchy was signed on.
Well, richer didn't help. But my expert reckons it's too rich. Think I might listen to him now. Just need to get some jets...
Still no power at the 3000+rpm range. Took the opportunity to trial several different timing settings (+15 through to -15 from standard) all of which made no difference to the 3000+ range. So I guess it must be the carbs. I'll be looking at the main jets next round.
Well. At the Battle of the Buckets Sully60 broke his motor so a swap with mine was attempted. In the course of this swap we discovered something about my engine. It has now been fixed, but the bike is heavier than it was. At least the crank now gets oil though. I've never taken the clutch cover off before so at some stage of the engines life someone has and didn't refit the oil feed to the crank. Thanks to Sully60's eagle eyes () a complete meltdown has been avoided. ...
I've slotted the cam drive so I can adjust it and set the cam and crank at the std positions. The cam drive is a degree or two further forward than normal which would be right with 1mm off the block.
Ignition timing has been changed but made no real difference. Block height has changed. I just want to set it correct. To do that it must be measured. Slotting it both ways still doesn't tell me where it should be...
Had it out on the track today but there's still no top end. Pulls nice and clean from the bottom of the rev range then goes flat at 50 or 65%. Revving higher it starts to miss. I will be looking at the timing first, then the cam timing.
The motor is still in the tuning stage. Last meeting showed a slight miss in the mid range and up. At Sully's suggestion I changed the timing which helped a bit. Since then I have fitted the lightened flywheel (woah! what a difference) and enlarged the mains a little (very little). Next weekend we shall see how she runs now.