Jump to content

Some issues since rejet...

Recommended Posts

Been running into some problems since the rejet. Only happens at normal operating temperature. I'm here in Colorado Springs.

Also, I never got around to removing the baffle but Eddie gave me the jetting info based off of the baffle being removed. Will this affect things?

-Will die at idle. Once it gets hot it will run for 3-4 minutes then shut off. It fires right back up though. It will stay running just fine with the choke on.

-There is a slight slight skip at idle. It doesn't purr but it doesn't sound that bad either. I've never had my hands on a good one so I don't know if that's normal. I'm a mechanic and I feel it's something I could pick up but not a lot of others.

-At idle, I have to ease into the throttle to rev it. Giving it a good blip or yank will bog it out.

-As soon as I put it in gear and let the clutch out it bogs out. I can ease the clutch out very slowly and it will go on it's own accord.

-I have to ease it into the RPMs. As soon as I try to give it a good blip it bogs.

-Once it gets going, it will stumble at lower rpms and then pull hard at higher rpms.

-I came across some ice on the road and pulled the clutch in and it died as I started to slow down.

-Shifting into a higher gear, it will continue to be a dog until higher rpms

I shut the fuel off and brought it home, figuring this was above my head.

Any help would be appreciated.

Share this post


Link to post
Share on other sites

those jetting specs sound about right for ~6000 feet and eddie sure knows what hes talking about.... I would make sure you have all the vacuum hoses hooked up.

-check the vacuum hose to your fuel petcock

-make sure there are no clogged jets (this can happen easily in the winter!)

Share this post


Link to post
Share on other sites
those jetting specs sound about right for ~6000 feet and eddie sure knows what hes talking about.... I would make sure you have all the vacuum hoses hooked up.

-check the vacuum hose to your fuel petcock

-make sure there are no clogged jets (this can happen easily in the winter!)

I just replaced the jets and cleaned the carb. This has all happened with in the past two days and the bike has only been warmed up and rode/bogged less than an 1/8 mile. I simply pulled the pilot and blew it out as it required the stocker. Was this possibly not enough?

There is no petcock vacuum hose provision.

i would pay attention to the pilot jet / circuit

inspect the accel pump squirt

Where/how can I check the accelerator pump squirt?

Share this post


Link to post
Share on other sites

I'd also like to clarify that I have an E model. The bike was sort of a hand me down that I knew nothing about. It was in pieces and from what I had I gathered it was an S model. I now know better. In another thread initially looking for jetting advice I referred to it as an S.

Share this post


Link to post
Share on other sites
So what is your altitude?

What exhaust ?

Is it an E with a stock Keihin carb? The jetting you posted is for a mikuni carb

Is air box snorkel removed or 3x3 mod been done?

hey Craig,

2002 Suzuki DRZ400S

6,800 - 9,000 above sea level, 50-80 degrees F, 50% humidity Slow trail riding

3x3 airbox mod, baffle removed from exhaust, everything else is unmodified

that's his bike :bonk:

Share this post


Link to post
Share on other sites
So what is your altitude?

What exhaust ?

Is it an E with a stock Keihin carb? The jetting you posted is for a mikuni carb

Is air box snorkel removed or 3x3 mod been done?

Altitude is approximately 6,000 feet above sea level. Riding will take place anywhere from 6k-9k.

Stock exhaust, gonna open it up soon and clear a bit out. When I asked Eddie for jet info I told him stock with the baffles removed.

It is a Mikuni carb.

3x3 has been done.

I think I'm going to bring it in the living room and pull the carb again and double check the pilot. It's damn cold outside. I'm envious of your warm Aussie weather and Hilux availability.

Share this post


Link to post
Share on other sites
Thanks iitreatedii. It's not an S. I got it in parts and put it back together. At the time I thought it was an S.

oh so you do have an e...that would explain why jetting is off...do you have an FCR 39? and if you do im assuming you bought a Mikuni BSR 36 jet kit

Share this post


Link to post
Share on other sites

I would replace the pilot jet....

Your jetting should be ok ....

You bought the JD jet Kit for mikuni carb...Was it JD005?

When you get it running , try partly covering you airbox , say 1/3...

If it runs better your bike is lean and may need to go to a richer needle setting..

Follow this procedure to check your pilot circuit...http://www.thumpertalk.com/forum/showthread.php?t=327405

Share this post


Link to post
Share on other sites

Correct, JD005.

Got it in the house now. Should have it back apart soon.

I still have to wait until Monday to go get a new pilot jet. I'm also going to look for an extended air/fuel screw.

Share this post


Link to post
Share on other sites

hey craig would he have to change his pilot jet size with the extended fuel screw? Im from a different area and with my old setup it was 22.5 (stock) pilot jet with screw and without screw 25 (MRD SSW STOCK MIKUNI STOCK BORE 3X3 K&N-JD JET KIT)

Share this post


Link to post
Share on other sites
I've been reading it varies depending on the extended fuel screw itself, or at least that's the understanding I've come to via searching.

I bought Kientech

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×