I recently bought a 2003 DRZ400S and thought it would be a good idea to check the valves clearance etc . I timed the engine on TDC with the magneto mark aligned as per the manual but I find the cam timing slightly odd. The arrows pointing upward are on the 1st and 15th pin as they should but with the magneto timing mark aligned they are not perfectly straight. Same goes for the arrows that should be parallel to the cylinder head casing. Is this normal or should they be absolutely perfect ?
By Ninja pig234
I recently bought a 2000 Drz400s and cant get the fcr carb adjusted properly. The bike has 434 big bore kit, fcr39, 3X3 mod, and slip on DG exhaust. Was wondering if anybody else has this set up and what jets they are running or any idea what to fix.
Currently the bike keeps breaking up
By Woody Oakson
I have a 2008 YZ450F with a stock header pipe and Pro Circuit T-4 Slip-On Exhaust. I'm 99% sure the slip on is shot because its loud as hell and when I take it off and shake it it rattles. I would repack it but the screws are all stripped ect.
Anyways I've gone over the carb multiple times and I've got it running pretty well. The only issue I have with the bike is that it sputters and pops around 1/2 throttle when I hold it there. When I give it full throttle from any RPM it runs great or when I give it about 3/4 throttle it spins up like a top to redline.
Initially the popping and sputtering was way worse I made the situation better by moving the pilot jet up in a few sizes from a 45 (stock) to a 62. The issue has gotten way better since then but I'm not super sure what to do from here. Should I keep moving my pilot jet up in size because that's a pretty large jump right? I tried changing my needle clip position but that didn't help much if anything it just made starting it worse and little to no impact on the ride.
Any input on this would be helpful. I don't want to buy other slip on. Also as for the rest of the carb I'm very sure everything else in it is what it needs to be at. I've replaced all the gaskets and O-rings cleaned all the jets, valve holes ect. fixed the accelerator pump timing. I just thinks its strange that my pilot jet size is going so far from the stock 45, but all symptoms point to the bike running lean.
I've been riding my 2002 400s with stock 15/44 gearing for a while now. Unfortunately I find myself having to do a lot more highway than I would like to, to get to where I want to ride the dirt. I'm building the bike into a light adventure bike and I don't ride any super technical trails (I don't want to completely lose that ability though) but I do like some so-cal mountain trails. I anticipate a lot more highway miles in the future in order to reach the trails I'd like to ride, also meaning I'll be adding a little weight, camping gear etc.( I am a 150lb rider) I saw a 43t rear sprocket available, would 15/43 make any noticeable difference in my highway rpms (65-75) and how much damage would it do to my abilities on the trail. I would also like to know the same for 15/41 and if anyone can let me know what changes in chain would need to be made. This will be my first time experimenting with a gearing change on any bike that I have owned.
Bike has 3/3 mod done, stock exhaust and a JD Jet Kit.
By Southwest ORV
I have seen some discussion about DRZ400 (DRZ400S, etc) vs whatever other bike, when it comes to power. My riding buddy and I threw down some good old drag races this morning on the way back home after some adventure in the forest. I own/ride a 2002 KLX300R. We ran two heats, one on gravel, then one one asphalt. Who do you think won? See below: