jimmer said:
Teazer, how much/little work is done on the motor,porting,(34's?),weight? You look pretty beefy, and I see you have an airshifter. What does it typically run in good air?
Beefy !!!!!! I thought I was looking svelte. It's just that my leathers keep shrinking... Combined weight of bike and rider is right around 650. The bike is around 100 pounds less than stock IIRC and I weight around 200 in leathers boots helmet etc - maybe just a tough more. Side covers are C/F, wheel rims are aluminum off a TZ350, front disks are CBR600, calipers are SV650. Axles are gun drilled and lots of aluminum fasteners. No Ti on this one though. Electric foot and gears removed and lightened gear train to water pump. Barrels ahve also been lightened externally. Pipes are street JEMCo and sign off way too soon so I have to over rev to get anywhere.
Carbs are stock BS40 as required by the "Stock" category it runs in. I have run it with UNI filters, stacks and now with some custom inlet rings I designed and they are strongest at the deep end. porting is incredibly mild. I built it as a mild mannered street bike with slightly raised exhaust ports and cleaned up inlets on an MAB block IIRC. Compression is raised a touch to around 165psi cold cranking. Ignition is 40 year old OEM coils fired by a home brewed DYNA ignition with fine wire plugs.
Air shift is a CO2 system using a 4oz paintball tank through a regulator. I have finally been able to find pin valves, low and high pressure gauges and decent small regulators to drop the 1800 psi tank pressure to around 120psi for the solenoid and air cylinder. Kill box cuts ignition for around 60 milliseconds to account for the stock heavy OEM shift design with too many dogs. I shift at WOT using the horn button which has a hidden mini switch to change from street (horn) to track (shifter) operation. Current motor has a low forst gear from a JKL motor - ideal for teh street but drops in a hole at the 1-2 shift.
For my next motor, I'll be using a GS1100 trans with higher than GT750 first gear and all undercut and shimmed.
Times are really slow because I have horrible 60 times. PB is 12.8 at 111 at Martin (131) last year. I need more practice. Last two years had no TnT time and only one event each year. Not what you would describe as steady consistent practice.
But it was built for the street as a mild torquey motor that doesn't much care what gear it's in. No dyno testing after year one when different pipes and fuels were tried. Now we cannot use any fuel with Ethanol (even street gas) so no more U4.4 which has the best pick up of any fuel I have tried. back to good old C11 or C12. Runs as well on street 93 as those.