Jump to content

FCR fuel leak from Accelerator Pump?

Recommended Posts

39mm FCR MX.

It looks like fuel is leaking from my accelerator pump, where the O ring mod has been done, possibly through the shaft. It is very difficult to see around the crank case vent box.

I idled the bike on the side stand for 10 minutes with no leak anywhere.

I idled the bike on my center stand for 10 minutes and no leak anywhere.

rev the bike a few times and fuel is leaking. I cannot think of where else it could be coming from. Any ideas?

I know I will have to pull it and replace the seals, any other ideas would be helpful.

Is it common to have a leak around this shaft? Anyone else had a leak here? I am just thinking there may be something I am overlooking or need to replace besides the seals.

Thanks,

Keith

Share this post


Link to post
Share on other sites

BTW, The bike runs perfect. I have not noticed any miss in idle or hesitation.

Share this post


Link to post
Share on other sites

It doesn't even seem possible that fuel could be coming from here? But there is wet fuel on the black plastic pivot piece for the accelerator pump.

Is there any fuel in the top cap? I would not think so, but am not sure. I am actually worried there may be a crack somewhere.

Simplest thing first...The last part I adjusted before noting a fuel leak was changing clip position on the fuel needle. The bolts were not loose, gasket has no marks in it. I cleaned it all up and re-installed the cap.

Share this post


Link to post
Share on other sites

You are absolutely correct! I pulled the carb, then decided to pull the linkage while it was off and got a squirt of fuel out of the top end of the rod from the accelerator pump. Checked the diaphragm and it is cracked. I just need to see where is the best one to purchase.

Share this post


Link to post
Share on other sites

I have run into the same problem, but there doesn't appear to be any damage to the diaphragm. Any suggestions?

Share this post


Link to post
Share on other sites

I have run into the same problem, but there doesn't appear to be any damage to the diaphragm. Any suggestions?

I have the same exact issue!

Share this post


Link to post
Share on other sites

Are there two orings in there with the diaphragm? One sticks to lid and one sticks to body. Ive seen plenty cats take off lid and not see the o rings seperated and one falls and doesnt get seen. So the lid gets put on sans one oring. Probably the smaller flat one.

My opinion.

And keihin gasket sets dont come with an AP diaphragm. At honda they dont. I suppose elsewhere could be different.

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

Reply with:


  • Similar Content

    • By Bignerd0100100
      Hey all, 
      I'm looking at buying a 2004 Suzuki DRZ400EK or at least I think it's an EK according to Vin lookup websites, but it does not appear to have a kickstarter. I was told the bike was owned by a motorcycle dealer and that it has a current green sticker, and a California license plate but has not been registered for the streets since 2011. I want this as a dual sport but am not clear if the fact that it already has a plate means I am good to register it or if maybe they took away the ability to register it after it was plated, California loves to do that kind of stuff. Since the bike was owned by a dealer I would think they were up on the latest regulations in California, but who knows. Can anyone add any insight as to what I should look for on the bike itself like the carburetor, model numbers etc? Or do I just try my luck at the DMV?
    • By smokey9lives
      Hi,
      I have a 2003 DRZ (actually a KLX400) and the head tube bearings are shot.  I ordered a new set to install but I'm wondering if anyone has any recommendations on other parts I should replace while I have the front disassembled.  I was thinking about new rubber fork protectors, but are there other things that wear out on the DRZ front ends that you can only get to when disassambled?
      I also broke off a replacement key that I got for the steering lock.  I must have been made of cheap pot-metal.  Should I just remove the whole lock mechanism?
      Any tips or tricks for getting the old bearings out and the new ones in would be welcome!
      Thanks!
    • By antonyp
      Hey Guys,
      I recently bought a 2003 DRZ400S and thought it would be a good idea to check the valves clearance etc . I timed the engine on TDC with the magneto mark aligned as per the manual but I find the cam timing slightly odd. The arrows pointing upward are on the 1st and 15th pin as they should but with the magneto timing mark aligned they are not perfectly straight. Same goes for the arrows that should be parallel to the cylinder head casing. Is this normal or should they be absolutely perfect ?
       

×