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General Category >> Rubber Side Down! >> No power?
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Message started by savageguy1 on 04/13/17 at 08:17:45

Title: No power?
Post by savageguy1 on 04/13/17 at 08:17:45

I got the bike running, i have a reverse cone muffler and a cone filter but when i take off it isnt near the right amount of acceleration i need and after open throttle it dies. do i need to re jet it ? if so, to what?

Title: Re: No power?
Post by LANCER on 04/13/17 at 08:23:23

What brand air filter ?
Brand of muffler ? baffle ? straight through or other ?
What jets do you have in now ?
Other than filter & muffler, everything else stock ?
Was it running fine before the filter/muffler ?

Title: Re: No power?
Post by savageguy1 on 04/13/17 at 08:41:59

the muffler is just a ryca reverse cone with the regular baffle. i believe the jet is stock, and yes it was running fine before.

Title: Re: No power?
Post by savageguy1 on 04/13/17 at 08:42:38

And the cone filter is k&n cone

Title: Re: No power?
Post by verslagen1 on 04/13/17 at 08:56:54

You need to rejet.
You can't just slap on a new muff and expect it to run the same.

Title: Re: No power?
Post by LANCER on 04/13/17 at 11:40:56

Do you have jets already ?
What lis the model year ?

Title: Re: No power?
Post by savageguy1 on 04/13/17 at 11:43:16

No I do not I've the jets , but its a 1998

Title: Re: No power?
Post by Yoshi on 04/13/17 at 15:51:15

You'd only be a little lean from an aftermarket muffler but a cone filter makes it real real lean

Title: Re: No power?
Post by savageguy1 on 04/14/17 at 06:10:29

ok so I took it apart and the main jet was 145, does any body know the correct jetting for a reverse cone muffler from ryca, and a cone air filter?

Title: Re: No power?
Post by Dave on 04/14/17 at 06:16:28

It depends a bit on the elevation you ride at......with the stock air cleaner and a DYNA or stock muffler, a #150 main, and a #50 or 52.5 pilot works well....with 3 number 4 machine screw washers on the needle in place of the stock white spacer. (If you still have a lean surge at low throttle settings, remove 1 of the washers and try just 2). Higher elevations require smaller jets.....but until you get up over 4,000 feet I am not sure you need to change much.

With the cone filter folks tend to need a bit larger jets....I would start with a #152.5 main, #52.5 pilot, and 2 washers (unless you are over 4,000 feet msl). Each bike is different.....but obviously you are running lean with what you have right now.

Title: Re: No power?
Post by savageguy1 on 04/14/17 at 06:40:18

im getting black smoke out of the muffler is that lean or rich?

Title: Re: No power?
Post by Dave on 04/14/17 at 06:46:58

Black smoke is definitely overly rich......which means you likely have a problem other than just jetting.

What petcock do you have? Did you check the float level when you had the carb apart? Does the choke lever work properly (spring loaded and notches into position....and stays close)?

Title: Re: No power?
Post by savageguy1 on 04/14/17 at 07:36:34

no I have not checked the float level and I have a raptor petcock with no vaccum line.

Title: Re: No power?
Post by Dave on 04/14/17 at 07:44:22

Generally the float level adjustment is not so critical that it will cause what you are experiencing - however if the float is installed upside down (happened to one member), or the float is damaged or has a hole in it, or the needle and seat are defective and allowing too much fuel in the float bowl.

Or......there is the possibility that like one forum member your pilot or main jet has come loose and fallen into the float bowl....or you left the brass washer off the main jet and the needle jet is moving around.

I think the carb needs to be looked at. ;)

Title: Re: No power?
Post by justin_o_guy2 on 04/14/17 at 08:56:10

Tubing on bowl drain.
Check the fuel level in the bowl.

Title: Re: No power?
Post by savageguy1 on 04/14/17 at 10:40:20

it ran fine with just the air filter and the stock jardine slash cut exhaust before the ryca muffler, nut I will do a float test later today , and another thing, when i was riding and I pulled in the clutch and let off the throttle It would die , and in N, after revving it, it would die

Title: Re: No power?
Post by Dave on 04/14/17 at 10:48:17

If the idle speed is too low - or the idle mixture too lean......the engine can die when the engine suddenly comes down to idle speed from a higher engine speed.

This is a result of the closed throttle and high vacuum creating a lean condition....it is a common problem with carbs...especially big ones. My engine is jetted properly and runs great - but in a panic stop if I let the throttle slam shut and pull in the clutch while I am applying the brakes......the engine can die in the process.

Title: Re: No power?
Post by justin_o_guy2 on 04/14/17 at 11:02:14

I think he is saying
Have you adjusted the idle to about 1100?

Title: Re: No power?
Post by savageguy1 on 04/14/17 at 11:38:20

no I have not

Title: Re: No power?
Post by justin_o_guy2 on 04/14/17 at 12:34:01

Needs done first.

Title: Re: No power?
Post by savageguy1 on 04/14/17 at 14:40:46

it works fine now, took off the carb and I cleaned it put it on the bike, adjusted the fuel to air mixture, and no backfire, and plenty of power!

Title: Re: No power?
Post by justin_o_guy2 on 04/14/17 at 14:57:45

Good going,,