Fuel-Carb questions for '93 VXR650

[mikey20]

Re: Fuel-Carb questions for '93 VXR650

What kind of filter did you replace it with automotive filters can be to restrictive and prevent fuel flow.

[pitguy3]

Re: Fuel-Carb questions for '93 VXR650

I checked the petcock valve with air pressure and it checked on on both "On" and "Reserve". I did, however, replace the filter with one from the auto parts store. I will go by the Yamaha dealer on the way home and pick up the correct filter.

[David3aces]

Re: Fuel-Carb questions for '93 VXR650

I have used many auto filters on single carb yamahas (WR3s) for years with no problems. On twin and tripples that's a different story. The paper element inside the auto filters does breakdown and become restrictive, but they are so cheap that i just replace them every season. Could your carb problem be that you have the lines ( inlet/outlet) on backwards. Inlet goes on bottom.......

[Technical Support]

Re: Fuel-Carb questions for '93 VXR650

Automotive filters use a completely different paper filter, period. They are designed for high pressurized electric fuel pump fuel systems, not low pressure vaccum systems. Using the wrong filter is asking for a seizure.

[pitguy3]

Re: Fuel-Carb questions for '93 VXR650

Could your carb problem be that you have the lines ( inlet/outlet) on backwards. Inlet goes on bottom.......

We have a winner!!!!!... I took the carb off and looked at it close and noticed that the lines were reversed. I also noticed a whistling sound when i blew into the inlet. Removed the cover and discovered a missing rubber gasket... I still had the old one and put it on, primed the carb and viola... running almost like a top! Now I have to remember to take a set of screwdrivers to the lake and adjust the carb. It idles fast and you have to run it about half choke.

[David3aces]

Re: Fuel-Carb questions for '93 VXR650

Auto filters use a paper element inside as opposed to the oem filter that uses a nylon element. the paper does breakdown after a while....For the last 12 years, I have used the Auto filter with no problems on dozens of single carb Yamahas...unless it gets a few seasons too old it's ok

[John Kubiak]

Re: Fuel-Carb questions for '93 VXR650

Those paper filters do a GREAT JOB! especially MAKING SURE THAT THE WATER THAT PASSES RIGHT THROUGH THEM IS NICE AND CLEAN!!!!!

The OEM type Yamaha filter is actually a water separating filter..the automotine filters are not..nor are they designed to be!!!

[David3aces]

Re: Fuel-Carb questions for '93 VXR650

Water sinks to the bottom of the filter due to gravity. Both types are the same dimensions. Why would one stop water any better. I do find water being caught in the Auto filters......One can buy a $20 filter from Yamaha or a $2 auto filter....Yamaha mechanic since 1978

[John Kubiak]

Re: Fuel-Carb questions for '93 VXR650

PWC since 1988 Yamaha, Suzuki, Kawasaki, Honda, Ducati, Sea-Doo, Actic Cat, Harley-Davidson tech since 1976. Plus I have worked for some of the same folks that you have.

[BradMB2004]

Re: Fuel-Carb questions for '93 VXR650

A regular in-line filter will NOT seperate water like "bowl" type filter in Yami's and Sea Doo's. That's why some bowl filters have drains in the bottom of them. I was born in 83' and i know that:emoticont I don't think you have out smarted Yamaha...