Joined Jun 2001
1K Posts | 0+
Pasadena Ca.
I took advantage of the BMG discount and purchased my 04 from Dan Blum of Motoxotica on October 30. Since I wanted to dual sport the Berg, I had Dan take care of the accessory details necessary for full street compliance in California. Through Dan, BMG replaced the right side exhaust header, which made contact with the front tire 2 1/2 inches short of full fork compression.
I disassembled the engine before even riding the bike, and had Dale Lineaweaver deepen the valve pockets in the piston, remove the counter balancer from the crank shaft, verify alignment of the crank shaft bearing bores in the case, setup the crank bearing end play, rebalance the crank, connecting rod and piston as an assembly, and rebuild the OEM cam to his LRX2 grind. Dale also fabricated a custom spacer needed to correctly set end play on the transmission countershaft.
I asked Dale for some jetting advice and he offered a Jetting kit for me to field test. The testing is complete, and I must say it seems perfect. The mods included removal of the accelerator pump rod to disable the pump, installation of a different pilot jet, pilot air jet, main jet, custom needle and specific instructions regarding initial adjustment. At this time the details of the jetting is proprietary to Lineaweaver Racing.
I have 16 hours on the 04 so far, all in the So. California Desert, which has been VERY wet. I had been using one of Dales LRX2 cams in my 00 501, so I was used to its performance characteristics with a properly jetted (Lineaweaver Racing) Dellorto. The engine of the 04 pulls harder over the entire range than the 501, and is just as smooth under load without the CB as my 501 is with a CB. At idle up to 3500 rpm no load the 04 is buzzyer than the counter balanced 501, but it smooths right out when loaded. The throttle response on the 04 is instantaneous under all conditions. I am going to try winding the spring tighter on the Keihin to help me with throttle control in the rocks.
It was a big investment, but well worth it!
Joe
I disassembled the engine before even riding the bike, and had Dale Lineaweaver deepen the valve pockets in the piston, remove the counter balancer from the crank shaft, verify alignment of the crank shaft bearing bores in the case, setup the crank bearing end play, rebalance the crank, connecting rod and piston as an assembly, and rebuild the OEM cam to his LRX2 grind. Dale also fabricated a custom spacer needed to correctly set end play on the transmission countershaft.
I asked Dale for some jetting advice and he offered a Jetting kit for me to field test. The testing is complete, and I must say it seems perfect. The mods included removal of the accelerator pump rod to disable the pump, installation of a different pilot jet, pilot air jet, main jet, custom needle and specific instructions regarding initial adjustment. At this time the details of the jetting is proprietary to Lineaweaver Racing.
I have 16 hours on the 04 so far, all in the So. California Desert, which has been VERY wet. I had been using one of Dales LRX2 cams in my 00 501, so I was used to its performance characteristics with a properly jetted (Lineaweaver Racing) Dellorto. The engine of the 04 pulls harder over the entire range than the 501, and is just as smooth under load without the CB as my 501 is with a CB. At idle up to 3500 rpm no load the 04 is buzzyer than the counter balanced 501, but it smooths right out when loaded. The throttle response on the 04 is instantaneous under all conditions. I am going to try winding the spring tighter on the Keihin to help me with throttle control in the rocks.
It was a big investment, but well worth it!
Joe
