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soheil posted a topic in DRZ400/E/S/SMhello everyone! i recently bought a used 2007 drz400sm with ~24000kms(~15000miles) and i can say it has a good power runs great but by time im discovering some problems that might be serious.. so the bike has a full yoshi pipe 3x3 air box mod k&n air filter jd jetting currently running with 160# jet and the thinner needle (clip on the 3rd from top) so the first problem i noticed was while i was cruising about 90-110kmph(55-70mph) the bike was slightly cutting out and coming back, going back and forth like it was running out of gas.. but when i accelerate at those speeds it goes fine till i hold the throttle steady again.. really annoying shit so i guessed it was something wrong with the carb..so i tapped the 3x3 hole on the air box to see if it was lean or rich and yeah it fixed it a little bit.. so in the end i taped about 2/3 of the of the 3x3 hole and it was going ok.. after few days i went for a ride and it did it again so i thought maybe change the oil.. i drained the oil from the frame and engine and all together was 1500ml(motul 15/50 semi-synthetic)..so i changed the oil and filter and put 1800ml(motul 15/50 full-sythetic) and the oil was higher than the highest mark on the dipstick. took the bike for a ride and WOW it was running great! no wobbles no shitty cruising anymore! After a few days i took it for a ride for about 1 hour non-stop. and while i was cruising it started to wobble back and forth like it was running out of gas again.. i stopped, waited for about 2-3 min and checked the oil and the oil was barely touching the dipstick.. went back home, drained the oil and again found there was only 1500ml of oil in there... it consumed about 300ml of oil in about 200km(125miles)... Is this happening because i put a full-synthetic oil in it?? what do you guys think? need more opinions and suggestions because I told a pretty good motorcycle mechanic about it and he told me that most probably i need a new piston and set of rings but really need you guys to tell me what you think! also if in the end of the day i need to change the piston and ring what do you guys recommend? that guys told me to not buy any high-comp pistons and its better to put OEM piston and rings to not have problems in the summer because it gets really hot over here.. what about wiseco/vertex/ etc etc? (btw OEM piston kit here is about 200euros) thanks a lot for any help and sorry for my english..
Hey guys, so I got 3500km on my 2016 enduro (purchased new) and I just had to fill it AGAIN with oil for the third time!!! The first fill was almost 1litre at 750km (before first service), then the first service at 1500km which they drained/filled it and then I randomly checked the other day at 3500km and it was almost bone-dry, again (added another litre)!!!??? I called the dealer each time and they can't figure out what's going on. They said during the first service everything looked good and chalked the first drink to a fluke but there's still no answer as to why I had to top it off again. There doesn't seem to be any smoke indicating that it's burning oil but my dad did notice there was some residue inside the opening on the can. I'm going to give it another few hundred km's to see where this new batch goes as my dad mentioned the rings might still be working in but if it continues to keep going through oil I'm obviously going to bring it in to the dealer. Any ideas???