Been trying to help Berg1947 who is struggling with a carb issue and aware of many posts over the years requiring carb info especially airscrew adjustment and location advice. So I've scanned a few pages from the manual that relate to this particular subject to help Berg and fellow DRZ enthusiast...
DRZ125 Carb Set Up & Service - Incl Air Screw! - DRZ 125/125L/250 ...
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PLEASE READ THROUGH THE ENTIRE PROCEDURE BEFORE STARTING. THERE ARE SUGGESTIONS AND TIPS THOUGHT THE GUIDE. BEST TO KNOW THOSE AND THE "NEXT" STEP BEFORE WORKING ON THE CURRENT ONE. This preventative Maintenance "fix" is applicable and recommended for all year and model year DRZ 2000 -present NOT...
Just found a good article on thumpertalk DRZ will not rev and this fellow found out it was a regulator rectifier was toast. I may check that out next. First, the bsr36 carb doesn't have an accelerator pump. Something happened right after you ran out of gas, so it would be a huge coincidence if your RR failed.
All DRZ model hubs are the same regardless of wheel diameter and take the 20mm dia. axle.Rims are 36 hole hoops.Many aftermarket brands available for DRZ's also;Warp 9,SM Pro,Marchesini,etc all make Drz400 wheel kits.You can also relace the spokes of your hubs to dirt wheels and vice-versa to get what you need on the cheap if you have skills.
On the DRZ 400 S model, it's been established that the optimal wheel configuration is 18/21. My next question to you sages is -- Can you use wider rims than stock issue, front especially?