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Message: [QUOTE="xr400xr50r, post: 186570, member: 25101"] [b]'97 XR4 backfirin'[/b] Hi Guys........me again. This message is also listed on another board. Well, I had my first real trail ride over the weekend. Over 30 miles of trails and had only one (1) real complaint...early in the day doing some 1st and 2nd gear riding (mostly 2nd gear) the bike would back fire at low rpm as though it were "loading up". It only did this one or two times and when I ran it through the gears at a higher rpm it didn't happen again for the rest of the day. That and the supposedly "typical" near-stall when you "blip" the throttle at idle. Here's a little background. I just did an oil/filter change before the ride (1.9qt MOBLIL 1 MX4T fully synthetic motorcycle oil)and the oil level on the bike's dipstick (not the owner) is about an inch from the bottom of the stick (the 1st quarter of the dipstick range?? Is this normal??) The level before the oil change was at the upper limit. I am wondering if my slow jet (#60) is too rich? Do these bikes "load up"? Also, I was running 87 octane as that's all I had at home (man, that was probably a bad idea). I haven't replaced anything in the carb yet (everyone says to the the dual taper needle) and I am really as "low-buck" as possible. Well, if anyone has any tips feel free to share. Thanks in advance John [/QUOTE]