TO JET or DYNOJET... that is the question...

[Rashad]

Well, i think i need to jet my Baby. Ive had the V&H pipe on(bought it like that) forever..  Heres the kicker.. before, old engine.. it wouldnt rev past about an indicated 8k... sputtered above that... Im gonna go ahead and assume its not the tach beng lazy either... since it was always 8k..and it sounded like 8k to me.

NOW.. new motor.. carbs have been cleaned.. maybe adjusted somewhere..but bike seems somehow more lean(running pretty hott i think).. and the plugs show a slight lean. Also, it wont rev above 4-5k and it takes me until 6th gear to go 60mph!!!(close gear ratios puts me about 4-5k in a few gears in a row) this bike is not right at all right now... So.. im gonna assume it needs jetted.. and that it hasnt been yet. (im assuming this, but the brass plugs HAVE been removed already, so its a guess).

So, i have V&H pipe.. and stock filter. What jets (main and pilots) should i buy... and what seems to be about the right sizes for YOU? (the poeple that have V&H and stock filter is 'you').

AND also... im unsure as to whether its just worth it to buy the dynojet kit for its cheap price and free dynorun... instead of hunting around for single jets...

SO what  does everyone think?

ohh.. i just thought of something... ive heard a few poeple talk about a restrictor.... well my airbox has the open filter, and then the tank.. no other peice.. so maybe thats whats making it run more lean than before?? just a thought.

[Black Snowman]

The restrictor is with the K&N box filter to prevent you having to rejet. It defiantlely sounds like you have issues although I don't know if the jetting can hurt the performance as bad as you seem be having. I'll let more experianced folks voice their opinion.

[The Antibody]

Well, I'll start off with I'm not the most experienced. I have the V&H exaust and Dynojet kit. I would recomend the Dynojet kit if your not a pro. It's nice and easy to read the instructions. The only catch is you'll have to drill the slides. But thats a minor road block. Your bike will perform ten times better. I'm suprised it has run well at all without it. She needs to be rejetted.

 -Anti

[Rashad]

well.. i just read the carb tuning on pantabliagliano's website

and Srinath says that the pipe wont affect the lower half of the rev range.. so im not surprised.. its actually all making sense now.

So above 3-5 k.... there IS NO rev range....hehe. BTW, srinath, i accidentally replied to the wrong post but basically if you read the splitting cases one it was supposed to be posted in this thread... i was just asking for you input as im gonna buy these things tomorrow and do it!

[Black Snowman]

Mine was rejeted the cheap way before doing the pipe and intake and the change was realatively minor after putting on the DynoJet stage 3. Definately more power but the Srinath jetting technique works just fine for fixing the "features" of the stock jetting.

[Kerry]

ive heard a few poeple talk about a restrictor....

If this will help, here is a page showing my K&N in-airbox replacement filter -- with the restrictor.

K&N Stock Replacement Air Filter

EDIT: Links changed from sisna.com to bbburma.net

[Rashad]

thanks kerry... SO what is the purpose of the restrictor? Is that only if you dont wanna rejet at all? Because you would think with a k&n you would want unrestricted airflow.. wouldnt that just be as good as stock without a restrictor?

Thanks!

[Kerry]

Rashad,

I installed the restrictor because I bought the K&N more for its reusability than for high-performance.

My Haynes manual says to clean the stock filter every 2,000 miles with compressed air, and to replace it every 7,500 miles. Have you priced a stock air filter at a dealer lately?  I'd be broke if I followed that particular maintenance schedule!

I haven't rejetted my bike.  [Blasphemy!?]  After 24,000 miles I guess I'm blissfully ignorant.  Nor do I have any plans to rejet - except for maybe some larger pilot jets to reduce my winter warmup headaches.

I assume that my K&N filter (the SU-5589), installed without the restrictor, would constitute part of a Stage 1 setup.  But I don't know that for sure.

[Rashad]

ok i gotcha!

Im hoping srinath sees this and posts everything that i would need for my particular situation and perhaps explains the washers thing too..

ahem..

*hint*

:mrgreen:

[The Buddha]

I was looking at the other post...(9 pages thread). K&N in the airbox and pipe...Unless its some fancy race baffle I'd try a 127.5 or a 130 mikuni mians, 40 pilots and 1 #4 washer under needle.  I still dont htink your problem is just smaller jets though...rip in the diaphragm will be my first bet...With jetting that is set lean etc the bike will run but have problems like surging or lack of power. If you dont go over 5K no matter what...I'll say check the diaphragms...
Cool.
Srinath.

[The Buddha]

OK BTW buy mikuni jets...not that DJ crap...My jetting method is perfect, I have the DJ stuff but have not tested it...I'd stay with mikunis but maybe you want to buy a DJ and have it lying about...at $25+10 its a good bargain...The slide drilling may not be needed but if you have problems when you open the throttle fast, but its fine when you open it slow...Your slide needs a hole blocked... No big deal...I have blocked the slides without that stupid kit and its easy.
Cool.
Srinath.

[miket]

With a similar setup, V&H + uni filter in the airbox, I used 127.5 mains, 40 pilots, 2 washers under the needle, mixture screws 3 turns out. It runs great.

You can check my web page for a detailed description.

[Rashad]

OK.. ill check the diaphrams guys.. if thats the prob, how expensive are they? Also, these washers your talking about... is the #4washer just a standard washer? like can i pick some up at a hardware store? im a little confused on that one.. so i just put the washers in under the jet needles?

Ill try it without dyno jet.. since i can be more specific and as srinath says, dynojet uses their own numbering system which would just confuse matters.

[Rashad]

OK... i got the main jets... they were out of 40 pilots.. so ill see how i am without those..

I also ordered the diaphragms and a new oil pan gasket, and 6 quarts of oil.. all this comes to about 80 bucks...arghhh  

But im still foggy about this washer thing... #4 huh?

[miket]

#4 is the size of the washer. Just go to a hardware store and ask for a #4 brass or stainless steel metric washer, they'll know. Probably less than $0.25. Again, check my web page and you'll find a picture and detailed description.

[The Buddha]

OK... i got the main jets... they were out of 40 pilots.. so ill see how i am without those..

I also ordered the diaphragms and a new oil pan gasket, and 6 quarts of oil.. all this comes to about 80 bucks...arghhh  

But im still foggy about this washer thing... #4 huh?

Well were your diaphragms bad...Those are bloody $$$ and you can actually fix ripped ones... You lookt at the light wiht them and you shouldn't see any light through them in any spot. That's the test.
Cool.
Srinath.

[Rashad]

welll.. they were  about 16 bucks a peice...  and no i couldnt check them today.. i just ordered them.. should i cancel that order? If they arent bad... what should i check next?? im gettin worried.. i just brought her home and man, it takes forever to go 60.

[Rashad]

I just had a thought.

I need a favor from you guys... anyone can do this.. start your bike with the choke..let it warm up or whatever.. and see how high it will rev. I am suspicious of my choke not being totally turned off.. i had trouble with it, and the cable wasnt pulling it right for some reason today. I cant tell if its on or not. Also, the damn clutch from the new motor failed today.... completely done.. so im putting mine back in, as its fine. (you can tell he beat that thing, or didnt know how to ride) But this would explain the revving problem.

ALSO..srinath.. i revved it to 7k today!! But it was sitting still.. and for some reason it appears to get worse the faster i go.. would this constitute more air getting into the carb diaphragms??(assuming they are ripped).

ALSO AGAIN...A mechanic told me (he has worked on many gs's) that a bike once did something very odd that wouldnt allow it to rev high... it sucked fuel back into the VACCUUM hose... is this possible? how would i test it.. apparently it was a bad petcock.

Thanks!

[Rashad]

Bump^

[Blueknyt]

I know since i did the washer trick, i havent needed to use my choke, but then again, in south fla it doesnt get as cold as most your northern folks get. i hit the button it fires, twist, twist, let it idle, once in awhile i just hold it at 3k for about 15 sec after startup and i dont have to mess with it anymore.  i remember i once had a pin hole in a diaphram on another bike, i fixed it with RTV silicon and bicycle innertube  it was alittle sluggish off the start, but about 5krpm it kicked like a mule.