tried a few times, when got to 74 mph engine cut out at 8200 rpm. Thought dyna was 9200 and stock was 8800. Finally went to 8300 and 75 mph ,run out of room. Trying to get jetting right, switched air sensor to inside air box and gain alot. Cams helped 3 mph in 600' and 2 mph on top. Spins bad to about 50 then really goes to up to 72 then slowly builds.

 

Mike penlands brother told me they had their B.F. jetted 162F/170R w/ 3 turns on the A/F screw.

This is w/ the Penland Cam and a BIG BORE KIT!

My Brute started cutting out on top end as well. However, it was around 63 mph w/ the my 27" 589's. If your at 165/170 then I'd say you may be to rich. I believe I was to lean on the mains w/ the DynoJet kit.

You might could try 160F/165R and see how that works.

I've switched back to OEM jets and I'm gonna try 158F/165R w/ my setup. I have the HMF utility, Dalton clutch kit, DG5 w/ 6* Key, Full snorkel kit, and TwinAir PowerFlow kit. HMF used a 155F/165R with just their Pipe and reported that worked well.

 

Travelor I think you need Psychological help.

Just listen to yourself.
She spins badly up to 50 MPH and then really goes/accelerates hard to 72MPH and climbs to 75MPH at 8300 RPM.

Honestly, I think every forum member wish they had your PROBLEMS. You got one mean Machine Bud!!

Kawasaki sells larger pilots. The Number is stamped on pilot. I tried a larger pilot but my bike kept puffing black smoke at idle and air screw had to be turned in to 1/4 turn. Plus, had turn up carb idle screw to get it to run/idle. I did notice my machine ran a little faster with the rich setting but I almost got Asphyxiated every time I started it in the garage.

You mentioned you switched air sensor to inside of airbox, what sensor are you referring to?

Also, sounds like you now need to go pick on some big bore prairies

LOL, wear your helmet, be careful on your test flights, & Merry Christmas[img]i/expressions/face-icon-small-happy.gif[/img]

 

Thanks for the advice BamaBrute and TuffEnuf. I just don't have my jetting figured out yet. It was around 0* when it run good now it is 32* Wouldn't idle without turning up idle screw, backfired when letting off throttle. MY holtzman attac system is suppose to compensate for temp and altitude. I removed the hose so it sensed the air pressure from inside air box and it started to run much better. But not real consistant. I have a spot marked off on a snowy gravel road around 600', I think. I gain 3 mph after cams if jetting was right or after moving sensor. A mark a little further gain 5 mph.
I should stagger mains more like they say, maybe 62 and 170 at -20 . When it was -25 the other day I should have set the attac. Happy Holidays everyone. By the way I dress up in my snowmobile gear to ride but cold air comes around goggle without windshield.

 

I would say it's the jetting also, the Dyna does redline at 9200, if your not afraid to try it, see what it will rev to in low and what your speed is, if the jetting is rich it will miss bad at WOT after the rev's climb, I'll bet if you can hit 8500 in high then 9200 in low wouldn't be hard...........

 

Thanks Stakk, good idea. A few times it cut out ,must have been rev limiter, Just like died until slowed up, then took off again. I will try low.

 

Who markets the Penland cams?? where can i find them??

 

www.mikepenland.com sells racing cams and pipes. Has everything on hand. Phone number on website.

 

Travelor
Where did you get your Attac temperature compensator From?
Does it work like or better than the Dial- a- jets? If so, you need to make it a little leaner if it's warmer. Next time I'm at the Local Kawasaki shop I'll check to see what size Pilot jets they have and PM you their address & phone Number if they have assorted larger sizes on hand.[img]i/expressions/face-icon-small-happy.gif[/img]

As far as your bike not reaching 9200 RPM in top gear, tach could be off. Peg the throttle on something slippery in low and see what rpm it cuts out. Maybe 75 MPH is all it will do with your tires, clutching, and Horsepower your brute is making. Keep in mind you are already 3-5 MPH faster than most Brutes. Sounds like you gained 3 MPH with the cams, did your RPMs increase with the addition of Cams? One sure way to tell is get your BF on a DYNO & tune it to where its making the Most HP and retest. Head porting & flow adds 6-7 HP and that may be your answer other than removing weight/lighter wheels & tires, or adding Higher compression pistons and or Big Bore kit.

An old mechanic told me once "Speed costs, how fast do you want to go?"

LOL

Tuff

 

in the end, isn't it all up to gearing? can you really go faster than your gearing allows more horsepower or not? delaying the rpm cut off will yeah, but only so much. i wish they would make entire aftermarket belt drives that let the belt ride hirer. maybe 100mph is out there that way.