Another CARB set up thread
07-04-2017 | 04:20 PM
#61
Senior Member
SuperBike
Joined: Sep 2010
Posts: 1,926
From: Bisbee, AZ
Read the sticky in the technical section by 8541Hawk. Your A/F shows that the pilot jets could be bigger. That is one of the things recommended in the sticky, as are shimmed needles and some other changes.
07-04-2017 | 09:12 PM
#62
Member
Squid
Joined: Mar 2016
Posts: 93
From: Hills of TIN UH C
I don't mean to hijack this thread, but lots of carbs experience here, so rather than start a new one I just would like to post my DJ run. I got a bitchin lean spot at 3.5k. I can't see anymore the runs the OP posted to compare. Unfortunately the pics expired. But, at least for my bike, it's always been there, even when I dynoed it years ago. Oddly now it's causing misfires every time I cruise at that regime (1/8-1/4 throttle). Not sure if it's on the front or the rear since I didn't have separate AF probes during the runs. Other than that, the engine runs solid all the way to redline. What do you guys think could be the culprit? I'm using a pilot jet #45. Change it or maybe try first to raise the needles a notch? I'll appreciate any advices that may save me from going more insane than the last time I worked on the carbs. Thanks!
What mods have you got?
Is the airbox snorkel in place?
I run 48s in mine with the dyno jet kit to get rid of the same problem but talkng to Marc st Factory Pro he mention it to be a matter of root diameter on the needle where actual problem was. I changed to Factory Pro kit and could tell difference first run before even tuning it.
07-05-2017 | 08:52 AM
#63
Senior Member
Superstock
Joined: Jul 2007
Posts: 342
From: CA, South of Heaven
Are your slow speed jets clean? What's the screw settings? Main jet size and clip position?
What mods have you got?
Is the airbox snorkel in place?
I run 48s in mine with the dyno jet kit to get rid of the same problem but talkng to Marc st Factory Pro he mention it to be a matter of root diameter on the needle where actual problem was. I changed to Factory Pro kit and could tell difference first run before even tuning it.
What mods have you got?
Is the airbox snorkel in place?
I run 48s in mine with the dyno jet kit to get rid of the same problem but talkng to Marc st Factory Pro he mention it to be a matter of root diameter on the needle where actual problem was. I changed to Factory Pro kit and could tell difference first run before even tuning it.
Engine has no mods. Snorkel is in place, (why taking it out?), standard air stacks (although I played with all sorts of combos following other forums users obsession disorders
), carbs have DinoJet kit.So in your case, you switched from DJ to the FactoryPro kit, and noticed the bike running much better? The lean spot at 3.5k rpm flattened? What are the differences between the kits/settings? If I remember correctly, when I chose it, the DJ kit had better reviews than the FactoryPro kit, but that was 10yrs ago and things may have changed. Do you have any dyno runs with the FP kit installed to compare?
Last edited by Killemall; 07-05-2017 at 08:55 AM.
08-18-2018 | 05:54 AM
#64
Senior Member
SuperSport
Joined: Jul 2018
Posts: 565
Found a tear in the front carb slide diaphragm. Was large enough to cause the slide to lift slowly or not at all. Was not there on install, such is the way with install old used parts.
Ordered some new carb slides from Honda, stock order goes in this morning at work so I should have them mid week.
Ordered some new carb slides from Honda, stock order goes in this morning at work so I should have them mid week.
Thx
08-18-2018 | 07:09 AM
#65
Thread Starter
Administrator
MotoGP
Joined: Apr 2006
Posts: 4,402
From: Kempner, TX
Current SH has Factory Pro kit in it..I'll send you the set up, it is based on what has worked for others and Im quite happy with it.
08-21-2018 | 06:43 AM
#66
Moderator
MotoGP
Joined: Jul 2007
Posts: 5,116
From: Gettysburg, Pa
08-21-2018 | 02:00 PM
#67
Senior Member
SuperSport
Joined: Jul 2018
Posts: 565
That would be helpful thanks. I think I'm going to try and get the DJ to work as best as possible. I've had a few people that I regard as solid in that arena stand by DJ and K&N. Worst case is they're wrong and I start over again. No biggy.
Thx
Thx
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