Yesterday I dismantled the top end of my friends BF-750, he had the miss even after his dealer fiddled with the jets small but there. Personally I build and design race engines more as a hobby. Having listened to the miss which to me sounded more like a back fire through the carb than an actual miss we decided to check and clean valves and replace some gaskets to eliminate the possibility of 1. an air leak and 2. a valve sticking. No jetting was changed from what the dealer had done. Valves were polished, everything cleaned and gaskets replaced. Well his BF-750 no longer as a miss at any RPM smooth as silk. Cannot say for sure which procedure exactly fixed the problem but of the things we did I would guess that there may have been an air leak on the front intake which caused things to lean out mainly at just off idle as you go up in RPM the overload of fuel can compensate to some extent eliminating the miss. On the other side there is a chance that a valve was sticking at lower RPM which is why there was a backfire through the carb and not really a miss there is a difference. Either way my friends Brutte runs like a dream.

 

Thanks for the info!!

 

do mine pleeeeeeeease lol

 

My BF had a slight miss at low RPM's which I believed to be caused by the incorrect needle. I took it back to the dealer he checked everything out and made some adjustments. Then he noticed that the front header nut was missing. He replaced the gasket and new bolts, no more miss. I couldn't believe it when he told me, I never heard a leak from the exhaust. It was small, but big enough to suck air when letting off the gas. Check the header nuts. Bike runs great now.

 

Sep1,
Glad to hear that at least your dealer was willing to look for an air leak. It only has to be a very small leak and you wouldn't be able to hear it over all the other noise. I think a number of folks here most likely have an air, some may not but the majority of the guys that can't get rid of the miss most likely have an air leak causing the lean mixture. I think this weekend we may work on my friends jetting a bit and see where we can lean it back out to.

 

man this sucks, I STILL can't ride my Brute, actuator module is on backorder and it won't go into 4wd. I can't even check the header bolts [img]i/expressions/face-icon-small-sad.gif[/img] I hate this thing! man I wish I would have bought something else, anything other than this Kawasucki! there, I feel better now, back to waiting....

 

2005BF750,

I really think kawasaki makes a good machine, sometimes when you introduce a new design there can be a few problems BUT most manufactures will identify and solve the problem and send the consumers that have purchased a unit a notice to take the machine in and have it checked. From what I have seen so far Kawasaki has choosen to ignore the problem and they must be aware of it simply from the number of dealerships that have called them early on asking what to do. Kawasaki has the resources to solve and correct the problems and thus send the dealerships a notice of what they need to check., ignoring a flaw is poor business you should not have to spend over 7,000.00 of your hard earned money just to put the product in the shop. Sometimes I wonder if the lean front needle was an intentional thing to comply with the EPA standard and if they had put a richer needle up front it would not have passed. But overall I do believe most of the 750's have an air leak to go along with the needle.

 

I was told by my dealer that they put that front needle in to pass CA emmisions, and the rest of us have to suffer. I had the new needle installed and it changed nothing, as soon as I get it back (it's been in the shop since September) I will check for an air leak. I tell you what else sucks about it, the whole time it's in the shop it's eating away at my warranty time. 3 f*&%ing months! I think they do that on purpose, make it so you have to keep taking it in to the dealer until your warranty is just about gone. I bought the extended 2 year warranty thank God but it still sucks!

 

2005BF750,

I had a hunch something had to do with EPA I have seen that happen before. I live in California, the poor folks that buy the 750 in Ca have a real problem since if the dealer replaces that needle and it does not meet EPA they are subject to a 10,000.00 fine. So what would Kawasaki's thought be there that if you live in Ca. you will also have to live with the miss? When it comes to sitting in the shop under warranty there are laws that cover that, one of them being the Lemon law. It is good that you got the 2 year warranty does it cover everything that the 6 month one does. I really didn't read it very close since I will do all of my own work anyway I just don't trust the training level of most of the mechanic's bad ones can create as many problems as they correct. Have you asked your dealer why he just doesn't take the module from another one he has in stock? Also write a letter to Kawasaki they list the address in their book, since Sept. is not acceptable I would have already blown a fuse.

 

Sorry to hear about your troubles 2005. I don't want to pi**-you off even more by telling you that I have not experienced any problems except the header nut falling off. My dealer did tell me that not all BF750's are affected by the wrong needle. As far as the actuator module, I don't seem to have any issues with them. One peventitative maintence trick I was taught was to spray them up with silicone spray, so mud, water, etc won't stick to them. This will not eliminate moisture build up but seems to help. I also spay up the boots and wiring about once a month. I have about 650mi on mine so far with no problems with tie-rods, water in the airbox or any other issues that have come up. I better keep my mouth shut before I jinks myself. Hope you get your problems solved.