Odd Fuel issue (m900 '95)

Norm · January 16, 2009, 07:45:30 AM

Bypass the fuel pump and see if that does it. I don't use a pump, I use a petcock to shut off the fuel when needed and a clear plastic fuel filter so I can see if any trash or water gets in there. Either way, I would go ahead with the trip.

erkishhorde · January 16, 2009, 07:55:43 AM

Quote from: Norm on January 16, 2009, 07:45:30 AM
Bypass the fuel pump and see if that does it. I don't use a pump, I use a petcock to shut off the fuel when needed and a clear plastic fuel filter so I can see if any trash or water gets in there. Either way, I would go ahead with the trip.

Hehe, I have a petcock too. Is that redundant? It's between the tank and the fuel pump.

Just need to shower and then get the bits. I'll post up in a little while for more direction, thanks guys.

erkishhorde · January 16, 2009, 10:22:41 AM

Quote from: Norm on January 16, 2009, 07:45:30 AM
Bypass the fuel pump and see if that does it. I don't use a pump, I use a petcock to shut off the fuel when needed and a clear plastic fuel filter so I can see if any trash or water gets in there. Either way, I would go ahead with the trip.

If I were to bypass the fuel pump, pretty much all I would need is a vacuum cap and an adapter to fill the space where the pump used to be, yes? Do you recall if the hose that goes into the pump is the same size as the hose that comes out or even what size they are?

erkishhorde · January 16, 2009, 10:27:30 AM

Quote from: Ducaholic on January 16, 2009, 07:25:24 AM
The original fuel pump for this bike is a vacuum actuated type. It is not electric. Look for the pump on the right side of the bike. It is mounted with two screws on the vertical frame tube just behind where my fuel pump is mounted in the picture. It is shaped like a pentagon if I remember correctly. There should be three hoses coming off of it. One supply hose from the tank, one hose that goes up between the carbs, and a smaller hose that goes to one of the intake manifolds. The smaller hose is the vacuum line and that's what needs to be plugged. When you buy your fuel pump pick up an assortment of vacuum caps and you will find one that fits. Your gonna want to remove the vacuum hose completely and put one of the plugs over the port on the intake manifold so you don't have any vacuum leaks. You should also buy some small hose clamps, some electrical wire the same diameter as the wire on the new pump and maybe an assortment of electrical connectors. I didn't have to add any length to the fuel line so you should be okay there. The fuel pressure regulator I used is just a Mr Gasket brand dial type that should also be available at the auto parts store. You want to get the smallest low pressure pump possible and I believe that is the Facet brand. Look for the plastic body one instead of the metal one. The metal ones are loud and the plastic ones are very quiet. Post back when you get that far.
Jon

Alright, so both Pepboys and Autozone only had a Mr. Gasket brand 2-3.5psi fuel pump. It's a BIG sucker too. Using this will guaranteed cause one of the hoses to stick out the side of the bike.

That's $40 before tax. The pressure regulator (1-5psi) was another $25 and that sucker ain't small either. The pressure regulator was almost the size of the stock fuel pump. $:-\$ I'm not so sure these things will fit in the space I've got. Right now all I've gotten are vacuum caps. I'm sitting on the bypass idea. Trying to figure out what size adapter I need to join the two fuel lines.

Lol... I just check CA-cycleworks website. Fuel pump for the carbed monster is $27.

I'm thinking the bike will hold out for this trip. I'll make the run as is and order the part from CA-Cycleworks today. Who knows, I may even be up for riding down to his shop to pick it up and swap it out right there and then make my trip.

For anyone else's reference, stock fuel pump for the carbed monsters is ~$145 and dealers most likely don't have it in stock.

Porsche Monkey · January 16, 2009, 10:39:29 AM

If Chris has em for that price then I would jump on it. Sounds like he isnt too far away from you.

erkishhorde · January 16, 2009, 10:46:40 AM

It's 113mi but considering I just quit my job, why not, I've got time. I can pack up a few tools to do the swap right there outside his shop. If I push it a bit I might be able to get there right around lunch time and still have time to make the (then) 360mi run to see my friends.

Thanks for the guidance, Jon.

Porsche Monkey · January 16, 2009, 10:48:45 AM

No problem. Let me know how it works out.

erkishhorde · January 16, 2009, 08:17:47 PM

So, 240mi and an hour and half of tinkering in the parking lot later I'm all set.

It was great to meet Chris and Candice. It's always nice matching a face w/ a voice. I also got the see Chris' (now) shiny MH900.

The replacement that Chris sells is not a perfect fit. The mounting holes are not in the same spot so how do you mount it? Zip tie.

I was kinda embarrassed that it took me an hour and a half to swap out the units. Of course I forgot to bring a pair of pliers and had to borrow a pair from Chris. Then I dropped a nut into the engine and couldn't get to it and had to ask for a magnet.

Chris is great to talk with in person and was very helpful.

The new unit is there and runs great! At just under $30 after tax and w/ about $6 in gas each way, it's about the same cost as shipping it when all is said and done but I also got to meet new people and get a ride in. $42 totally beats $150.

Since I didn't wanna ride through LA I ended up running back up the 15 and was passing by my place at around 6pm. By then I was kinda tired and cold so I decided to call it quits. I'll make my run to SLO tomorrow morning.

Porsche Monkey · January 17, 2009, 06:35:50 AM

Good to hear. Glad you got it all worked out. Just figure out some way to secure it and you will be good to go. That's only about 5 bucks more than the rebuild kit I didn't use.

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Odd Fuel issue (m900 '95)