Ok, so we are not talking about the Busa here, but a brand new Suzuki DRZ400S registered road going machine.
I am doing the P.D.I (pre delivery inspection) on 3 new bikes we are selling here at the Dealership I work at (in NZ) and part of the PDI process is to "Derestrict" the bike.
The exhaust outlet cap has an internal sleeve/tube blocking off the exit gases all but about 5% of the exit hole diameter.The exhaust gases have to exit through a very fine mesh screen, then through a series of tiny holes about 2mm diameter.
The airbox has a large square hole in the top of it but that is blocked by a rubber sealing cap with a small snorkel.
So we remove the airbox rubber cap, we remove the exhaust internal cap and drill lots of holes in it, but the other part of the derestriction process is to remove the FCR flatslide pumper carb and the rubber manifold on the cyl head and remove a throttle limiting pin (reduces the throttle opening by 30%) and take a look at the manifold boot in the pic below, this is serious restriction to the intake, can only imagine how much power is robbed with this intake reduction!!
None of us have ever ridden a DRZ with it in untouched unrestricted form so we do not have any experience of just how GUTLESS the motor would be... but I reckon it would not pull the skin off a rice pudding.
I cut the center ou of it and used a die grinder with tungsten burr tool to clean it up to make a perfectly smooth edge . . .
I was wondering if you guys in the States have these same restrictions on the DRZ?
If anyone knows please comment, thanks!
I am doing the P.D.I (pre delivery inspection) on 3 new bikes we are selling here at the Dealership I work at (in NZ) and part of the PDI process is to "Derestrict" the bike.
The exhaust outlet cap has an internal sleeve/tube blocking off the exit gases all but about 5% of the exit hole diameter.The exhaust gases have to exit through a very fine mesh screen, then through a series of tiny holes about 2mm diameter.
The airbox has a large square hole in the top of it but that is blocked by a rubber sealing cap with a small snorkel.
So we remove the airbox rubber cap, we remove the exhaust internal cap and drill lots of holes in it, but the other part of the derestriction process is to remove the FCR flatslide pumper carb and the rubber manifold on the cyl head and remove a throttle limiting pin (reduces the throttle opening by 30%) and take a look at the manifold boot in the pic below, this is serious restriction to the intake, can only imagine how much power is robbed with this intake reduction!!
None of us have ever ridden a DRZ with it in untouched unrestricted form so we do not have any experience of just how GUTLESS the motor would be... but I reckon it would not pull the skin off a rice pudding.
I cut the center ou of it and used a die grinder with tungsten burr tool to clean it up to make a perfectly smooth edge . . .
I was wondering if you guys in the States have these same restrictions on the DRZ?
If anyone knows please comment, thanks!
