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Dynojet Installation

Old 01-07-2013, 07:24 PM
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Dynojet Installation

Ok so I got my dynojet kit in a few weeks ago and finally got my carb sync tool today so since tonight is my friday I'm going to start working on the bike. I was going through the manual as to which screws on the carb are which, where the vaccum lines from the meter are supposed to go etc etc. Upon inspecting my bike carbs i noticed it was a very very tight squeeze to get tools in there and work. My question is, is there an easier way to get to the carb so i can connect the brass fittings 1 and adjust the airflow screw 2. or at least any tricks that you have come up with. I know to rejet and drill the slides i will need to remove the carb entirely. But as far as syncing it after its reinstalled mainly. Thank you in advance for any info and or advice. I do have the manual and will be using it during this process. The local shop quoted me 3 hours($190) to do this job. So I figured I would give it a try seeing as now I have the tools I need. Hope to post pics through this process in hopes that it might help someone else. Aloha
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Old 01-07-2013, 08:10 PM
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Old 01-07-2013, 08:14 PM
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Lol 8541Hawk your such a character. Just waiting to what kind of shenanigans I get into this time eh? Hahaha
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Old 01-07-2013, 08:47 PM
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Use the search function, all of those items have been covered and lots of good info on there. When you remove your carbs is when you will gain all the room you NEED (not the room you want) to get everything sorted out so make sure you do everything you need to do before you go and install them back in there. Good luck! Sorry for ruining your fun there Hawk, still havnt given back enough for all the info I have gotten from here.

Last edited by Squid; 01-07-2013 at 08:51 PM.
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Old 01-08-2013, 03:10 AM
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Ok so after reading the instruction and a bunch of articles on the forum I took the bike apart. Took the carb off. The instructions said if you have a high flow exhaust and a k&n go two sizes up. So I took out the slides and springs, checked the diaphram everything looked good. Drilled the needle holder and the slide as instructed. Installed the needle, checked the c clip. From what I read since I have the K&N it was best to install the eclip on the 5th notch from the back of the needle. The front was jetted as 178 and the rear 175. Seemed odd but ok. So I went two sizes larger as per instructions 185 in the front 190 in the back. Turned the pilot screw all the way clockwise. Then back 2.5 turns. I determined this by marking the tool supplied in the kit so I had a reference point. Put it all back together, synced the carb with my motion pro. Took it apart to take off the brass fitting for the sync, installed the bolt back on. Put on my gear and went for a quick ride. At first everything seemed great. Throttle response was good low end was good. But as I got to more open road I went WOT and the bike started stumbling and shaking and would not accelerate or increase engine speed. Letting off on the throttle and slowly throttling up seems to fix the problem. My guess is that its running way rich which is why the problem is much more apparent at WOT. I'm not asking anyone to fix my problems. But some input would be nice. Should I back the eclip on the needle 1 notch or should i drop a jet size perhaps 180f/185r? Thanks

Last edited by JakeT; 01-08-2013 at 03:13 AM.
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Old 01-08-2013, 05:18 AM
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did you do anything with your slow jets. Try #50s and see if that improves WOT. may be running out of fuel instead of rich. Did you read the below thread?


https://www.superhawkforum.com/forum...ad.php?t=12878
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Old 01-08-2013, 08:33 AM
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Well instead of just throwing more parts at it try this....

Pull the choke out slightly (actually the enrichment circuit) and see if it gets better or worse.

If the bike runs better, you're lean. If it gets worse you are running rich.

Last edited by 8541Hawk; 01-08-2013 at 08:47 AM.
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Old 01-08-2013, 08:39 AM
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Originally Posted by 8541Hawk View Post
Well instead of just throwing more parts at it try this....

Pull the choke out slightly (actually the enrichment circuit) and see if it gets better or worse.

If the bike runs better, your lean. If it gets worse you are running rich.
That is as simple as it can get to check if the bike running rich or lean
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Old 01-08-2013, 09:08 AM
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Originally Posted by 8541Hawk View Post
Well instead of just throwing more parts at it try this....

Pull the choke out slightly (actually the enrichment circuit) and see if it gets better or worse.

If the bike runs better, you're lean. If it gets worse you are running rich.
Thanks nath, I didn't touch the pilot jets. Before i rejetted I didn't have any noticeable problems at low 1/4 throttle so I had left the pilots alone.
8541 thanks for the suggestion I guess at 12am in the morning I might not be using the best thinking and didn't try to pull the choke to see if it solved the problem.

When I bought the bike it had the k&n filter installed already. My wife and son bought me a dan moto gp exhaust that I installed a few weeks ago and everything ran ok but I was losing on the top end which sugguested to me that I was running a little lean as I don't have the baffles in the dm exhaust.

I read this thread however
https://www.superhawkforum.com/forum...problem-18166/
and it suggests that 2 sizes up might be WAY too rich especially with the needle shimmed in the 5th notch.

I'm gonna go for a ride and see if the choke fixes it or makes the issue more pronounced. and from their either take the jets down from 185/190 to 180/185 and see if that helps at all. Then I can play with the needles. I don't want to do too many things at once cause then i'll never know wtf I did wrong.
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Old 01-08-2013, 09:39 AM
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Ok just got back from a straight I have by my house. And 1st gear no problem. 2nd gear wot stumbling. Pull the choke out once again 1st gear no problem 2nd gear stumbling the whole way up. So that confirms what Im pretty sure I already knew it was rich. Dynojet troubleshoot says also that if you demand hp and it stumbles it more than likely too rich. I'm going to go down a jet size seeing as the needles are more for fine tuning and if I'm that rich one notch back on the needle probably won't solve it.
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Old 01-08-2013, 09:59 AM
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Just pull the choke out a little bit when you do this... you can make a bike look rich when it's running lean if you pull it out too far. You just want to ride it, pull it out slightly (I like to while I'm riding to notice the change) and see if it gets better, not yank it all the way out then WOT...

Hope I'm making sense, maybe you already did it this way. You likely are rich, just trying to avoid mis-diagnosis.
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Old 01-08-2013, 01:10 PM
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Originally Posted by 7moore7 View Post
Just pull the choke out a little bit when you do this... you can make a bike look rich when it's running lean if you pull it out too far. You just want to ride it, pull it out slightly (I like to while I'm riding to notice the change) and see if it gets better, not yank it all the way out then WOT...

Hope I'm making sense, maybe you already did it this way. You likely are rich, just trying to avoid mis-diagnosis.
Thanks for the advice 7moore7, I did how ever pull the choke out in stages, 1/4 pull 1/2 etc etc. It was way way rich. So at 630 or so when I got up and posted the last post I tore down the bike again yanked the carbs. Rejetted to 180/185 and left the needles in the 5th notch. Set the idle, resynced the bike(as I was led to believe each time you rejet you need to resync.) Tore all the sync stuff out, put it all back together and went for a ride. Wow what a difference. No more chugging, no more flat spots at WOT. I played with the choke a bit to see if i should go richer and it ran worse if anything I think im going to move the needle one notch back and see how it runs. If you change the needle spacers do you also have to resync? I figured any changes to the carb a resync would be ok but maybe no necessary. Perhaps you carb gurus can shed some light on that. It pulls hard all the way up to 9k(I rarely go past 9k as I feel the valves start to flutter and its unnecessary, though I could be wrong. Let me know if you have any suggestions. Thank you everyone for the input you have all been very helpful even you Hawk
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Old 01-08-2013, 04:10 PM
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My setup is very close to yours.

I had a 185 and a 190 in it as dynojet suggests... The gas mileage wasn't great, and I could smell the unburnt fuel in the exhaust.

I went to #48 pilots, 175 front, 178 rear. 4th clip.

This setup worked well enough for me.
I went back to a stock filter instead of the K&N and it seemed to help as well.
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Old 01-08-2013, 09:28 PM
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What do you know we're back to 8451Hawks set up!
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Old 01-09-2013, 08:30 AM
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Lol, HRCA, weird, it's like he's using a similar bike or something...
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Old 01-09-2013, 08:51 AM
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Hawk doesn't recommend drilling the slides I thought just shimming the pilots?
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Old 01-09-2013, 09:15 AM
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Well you can't shim the pilots but.....

No I don't believe speeding up the slides is the answer for this bike, so no I don't recommend drilling the slides and using the lite springs.

Though I do like how the bike runs with stock main jets and one size up on the pilots.
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Old 01-09-2013, 09:21 AM
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Originally Posted by 8541Hawk View Post
Well you can't shim the pilots but.....

No I don't believe speeding up the slides is the answer for this bike, so no I don't recommend drilling the slides and using the lite springs.

Though I do like how the bike runs with stock main jets and one size up on the pilots.
Oops sorry you shim the needle right?
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Old 01-09-2013, 09:24 AM
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Yes that way you can use the stock needles which actually work very well.
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Old 02-07-2013, 09:22 AM
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Update?

Originally Posted by JakeT View Post
Oops sorry you shim the needle right?
I'm patiently waiting the the update and starting to lose my temper

Sounds like the needles are too high. With the big jets I'd put the clip in 4th position.
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Old 02-07-2013, 09:41 AM
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Originally Posted by zxbud View Post
I'm patiently waiting the the update and starting to lose my temper

Sounds like the needles are too high. With the big jets I'd put the clip in 4th position.
I haven't had a chance to reshim the needles, though the down sizing of jets works, There's no flat up top and no bogging a little popping from the exhaust but I think reshimming should take care of that.
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Old 02-07-2013, 11:53 AM
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Don't drill the extra hole in the slides, Dont use the dynojet springs, stick either two 180s or a 180 fr and 185 r mains in, needles on 4th clip, 48 pilots and you should be good to go.
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