Whack Throttle Wide Open.... Bog?
Posted 26 October 2003 - 06:05 PM
Posted 26 October 2003 - 06:18 PM
Posted 26 October 2003 - 07:55 PM
I can, I can! DOC mod, P-38, and hours of jetting and testing. Have patience, once you get it right it's pure magic. the bog didn't bother me much until I rode a bone stock CRF450 and you could wack it like a 2 smoke. After that I HAD to get mine right. It was worth all the work.
Posted 26 October 2003 - 08:03 PM
Posted 26 October 2003 - 09:07 PM
Posted 26 October 2003 - 09:15 PM
Big doubles out of corners come to mind...
Posted 27 October 2003 - 05:17 AM
Posted 27 October 2003 - 08:52 AM
Posted 27 October 2003 - 10:41 AM
Posted 27 October 2003 - 01:06 PM
> you twisted the throttle back fast enough.
do you own a car?
jim aka the wrooster
Posted 27 October 2003 - 05:18 PM
Wrooster- some interesting reading there. Will certainly keep me busy for a while.
I'll give it a shot.
Posted 27 October 2003 - 05:45 PM
Yep, no bog at all. Took some work but it can be done.
Posted 27 October 2003 - 06:14 PM
Posted 27 October 2003 - 06:24 PM
jim aka the wrooster
Fuel Injection is a little different. My old Cannondale didn't bog either... I guess I should have been a little more clear. But yes, my 84' Chevy Silverado w/ a carburated 350 won't respond right away when I punch it, but then again, my truck is a pile of steaming [@#$%&!].
I'm not sayin the bog can't be gotten rid of... I"m just saying that I haven't seen any 4-stroke bikes that didn't bog if you twisted the throttle fast enough.
Posted 27 October 2003 - 06:29 PM
Not really worried about it. But what you're talking about is exactly why I want to eliminate the bog. I just put new tires on my bike and they hook up soooo good now I can't get the rear to break loose without worrying that I'm gonna wheelie. Was playing around the other day thinking that if I could get rid of the bog then I could whack it and know that I'm gonna break traction when and if I decide I want too. Got me curious as to whether it was possible or not. Now it's just a challenge.
Posted 27 October 2003 - 08:32 PM
I love the bike, and based on what I have read here (and basic knowledge of engines/carbs), believe that the bog can be conquered. Once ski season settles in another month or two I am going to make it my mission to cure this thing. I am going to follow the recommendations posted on the FAQ to start with, and will post my progress/setbacks as I go.
Posted 28 October 2003 - 03:19 AM
My 02 nor my 03 had any sign of it. You could whack it till it turned blue and it kept on asking for more.
But both 04's can easily be stalled on the stand doing the same thing. So far it hasnt been an issue riding, and I havent gotten around to messing with it. I will however see what I can do to fix it eventually.
Posted 28 October 2003 - 07:28 AM
Here is how it came out. By backing the stock timing screw all the way out, the AP squirt just misses the slide. The slide goes up and the squirt comes out simultaneously. Zero delay.
The squirt duration is .165 sec (5 frames X .033 sec/frame) with a 75 leak jet. The bike has a slight bog with this set up, but it is much improved over the stock 90 leak jet. Squirt probably too short.
Then I soldered the stock leak jet closed and installed it. Squirt duration went to 1.353 sec (41 frames X .033 sec/frame). This also produced a bog, so here I'm probably too rich.
Next step, install a 40 leak jet to put me more in the middle of the range and do the 2003 updated BK mod if more fine tuning is needed. I'll keep you posted if anyone is interested.