RD350 Oil Pump Question

[captainslow]

thats a banjo bolt, and thats for an R5 or DS7

Oh! Looks like the connectors for the R5 are different. Are the oil pumps the same for the RD350 and the R5?

[SoCal250]

If I may ask, how did you manage to find part numbers for items that are not listed in the parts catalogue?

I pride myself on collecting meaningless, minute and obscure info related to all things Yamaha.

SoCal is the inf-mation GOD

Looking into the pump, the bushing is installed. So I don't need the washer plate. Thank you for this info.

Based on appearance, since it looks to be from an R5 that's correct, it would have the bush embedded in the housing since it's an 'early' pump.

The reason I asked about the tooth count on your ring gear is because I wanted to make sure you truly have a 350 pump. Many pumps are listed on eBay and other places as "RD350 oil pump" when they in fact came from a RD250 or DS7 or CS5, etc. You should be OK because I see a red paint mark on your pulley. R5 and RD350 pumps are "Red" color code in the Yamaha parts world. However, just to be sure what you have, post a photo of your ring gear or list the tooth count. A 250 pump will not work properly for your RD350. Based on the red paint and the banjo bolts (as Mark mentioned) I'd guess you have an R5 pump. It will work if you verify the internals are correct.

For oil distribution lines you'll need new 5mm oil feed hose Yamaha part # 90445-05M07-00 (1 package can do both sides), and 4 oil hose clips Yamaha part #
90468-02033-00. Economy has these parts. You won't need the banjo bolts on the old hoses. 1970 through 1972 250/350 twins used banjo bolts for oil feed, but 1973 and up switched to nozzles on the carbs.

If your carbs are missing the oil nozzles you will need those. Someone may have blocked off the ports in the carb bodies if yours are missing, hopefully they didn't bugger up the castings too much. The nozzles are a press-fit into the carb bodies on the outside of each carb, forward of the slide.

https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/fuel-and-airintake/carburetor-rebuild-kits-parts-related/carburetor-parts-carburetor-rebuild-kits-parts-related/misc-carb-parts/injector-nozzle-rd250350400-carb-oil-injector-nozzle/

[captainslow]

I pride myself on collecting meaningless, minute and obscure info related to all things Yamaha.

a living encyclopedia!

Based on appearance, since it looks to be from an R5 that's correct, it would have the bush embedded in the housing since it's an 'early' pump.

The parts list also lists the same numbers for the R5 and 350 pumps - 360-13101

The reason I asked about the tooth count on your ring gear is because I wanted to make sure you truly have a 350 pump. Many pumps are listed on eBay and other places as "RD350 oil pump" when they in fact came from a RD250 or DS7 or CS5, etc. You should be OK because I see a red paint mark on your pulley. R5 and RD350 pumps are "Red" color code in the Yamaha parts world. However, just to be sure what you have, post a photo of your ring gear or list the tooth count. A 250 pump will not work properly for your RD350. Based on the red paint and the banjo bolts (as Mark mentioned) I'd guess you have an R5 pump. It will work if you verify the internals are correct.

32T; is that the correct one for the 350?

For oil distribution lines you'll need new 5mm oil feed hose Yamaha part # 90445-05M07-00 (1 package can do both sides), and 4 oil hose clips Yamaha part #
90468-02033-00. Economy has these parts. You won't need the banjo bolts on the old hoses. 1970 through 1972 250/350 twins used banjo bolts for oil feed, but 1973 and up switched to nozzles on the carbs.

Thanks. Would you recommend going with transparent tygon lines for fuel + oil or stick to oem?

[SoCal250]

32T is correct for a 350 pump. You're good

RD350 & R5 pumps are interchangeable (both "red")

[captainslow]

32T is correct for a 350 pump. You're good

RD350 & R5 pumps are interchangeable (both "red")

Thanks so much for all the help