Need Advice and Help Appraising a Kart.

Jason Vehige · Posted: Wed Dec 26, 2012 4:07 pm Post subject:

Use zip ties in the heat of battle ... When you have time and you don't want it to fall off safety wire is the only way to go Cool

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Jason Vehige

08 Gillard Charlotte / SGM sl204
05 Vanspeed Sirio / SGM sl204

Joe Ricard · Posted: Wed Dec 26, 2012 5:19 pm Post subject:

No safety wire in the inside tanl fittings. it will only last a couple weeks before it cuts through the fuel line.

Ironically fuel is very bad for the plastic fuel line.

I am now giving Tygon a try and see how long it lasts.

Still think you need to rebuild your fuel pump.
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Arrow AX-8/ Rotax Sr.

Russ Clark · Posted: Thu Dec 27, 2012 6:23 am Post subject:

I agree on rebuilding the fuel pump. I have been trying to find a rebuild kit locally....boy does that get some interesting responses. It seems a lot of the motorcycle people around here don't know anything bout karts. I found one guy that seemed to know that Mikuni made fuel pumps. I also found a lawn mower shop that knew Mikuni made pumps but he was trying to tell me they were not rebuildable and he had a nice round one in stock that he would sell me that would do the same job.

Any ideas on the type of place to find one locally? We used to have Sears parts store that I would try but they closed about a year ago. What do the square pumps come on stock? The only half reference I could find was an FL-250, which is a four wheeler Honda stopped making in 1984. The kid I was talking to at the dealer said that was the year he was born so I knew instantly that I needed a more contemporary model that this thing came on.

I may just end up ordering one. I just really wanted to get something local for speed and to possibly start building a relationship with a local shop.

Joe Ricard · Posted: Thu Dec 27, 2012 7:57 am Post subject:

I would be suprised if a Square mikuni (like on Rotax) would supply enough fuel for a CR 125.
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Arrow AX-8/ Rotax Sr.

Michael Taksa · Posted: Thu Dec 27, 2012 9:00 am Post subject:

Motorcycle shops in my area have a catalog, Find a mikuni round pump that looks like yours in there and uy a rebuilt kit (would have to order). On the other hand rebuilt kits are $10-$20, and if someone in your area has a complete pump for $30-ish, why not buy it? and remember, you need two of them. Also remember if you are replacing membranes and stuff on your pumps, that the most important one is the little ones, not the big ones. And take pictures before EACH disassembly step. The membranes and gaskets are similar looking but they are different.

Shawn P. Hill · Joined: 02 Oct 2009 Posts: 120

Joe Ricard · Posted: Thu Dec 27, 2012 4:51 pm Post subject:

Carter Thompson · Joined: 26 Sep 2012 Posts: 10

Russ,

Try pulling off the bowl on the carb. After sitting that long maybe the jets are clogged up. only takes about 15 minutes to completely disassemble one and put it back together.

Carter

Joe Ricard · Posted: Thu Dec 27, 2012 5:52 pm Post subject:

Hey Carter, how is your new kart going?
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Arrow AX-8/ Rotax Sr.

Bill Schmidt · Posted: Thu Dec 27, 2012 8:01 pm Post subject:

Shawn,
Can I have your old pumps? I love rebuilding those things.
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Bill Schmidt

'95 Trackmagic 125 shifter (Kawi)
'88 Red Devil F500 4-link rear (Rotax)

Joe Ricard · Posted: Fri Dec 28, 2012 6:19 am Post subject:

Bill I have two round Mikuni pumps that need rebuild. Wanna do mine. Because I think of the pumps just like Shawn does. Great big PITA.

I was amazed at how much difference there is in a new pump volume compared to one just 6 months old.
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Arrow AX-8/ Rotax Sr.

Jason Vehige · Posted: Fri Dec 28, 2012 8:27 am Post subject:

I have rebuilt my round Mikuni pump once since 2007.... Unless you count Blythville when 1/2 a rebuild was done out of user error (see previous comment about fuel pickup being IN the fuel).

Just making sure no potential KM peeps think fuel pumps need constant rebuilds Cool

Where in FL are you? Best bet is to find your closest Kart Shop for common parts as there are quite a few shops in FL ... Not so here in Middle TN
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Jason Vehige

08 Gillard Charlotte / SGM sl204
05 Vanspeed Sirio / SGM sl204

Brian Garfield · Posted: Fri Dec 28, 2012 10:26 am Post subject:

I never rebuilt either of the pumps on Lisa's and my shifters, the exception was Julian's 60cc when we first got it.

It is not a regular maintenance item, IMO, for what we do with the karts.

Brian

Shawn P. Hill · Joined: 02 Oct 2009 Posts: 120

I've only replaced mine once, and there really wasn't any reason to do it, I just wanted the 90 degree outputs. But I wouldn't rebuild one if I thought it was an issue, I'd just replace it.
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08 Mike Wilson Chassis - Mod Honda

Carter Thompson · Joined: 26 Sep 2012 Posts: 10