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Rd350!Oil pump adjustment

Started by Stacy1968, May 11, 2022, 12:50:17 PM

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Stacy1968

Hey all, what is the proper way to adjust a rd350 oil pump ? Mine seems to be over active.

Arrow

Set minimum stroke with shims and set pulley to correct mark, via the cable.

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SoCal250

75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

Stacy1968

I have a Haynes and they are sometimes wrong, I thought I could get some help here. thanks

Striker1423

You'll see a triangle mark on the pulley of the oil pump. That should line up with the roll pin on the body of the oil pump.

The minimum stroke Arrow referenced is set by using the priming wheel on the side of the pump to open the gap at rest until it hits the highest point. Then that gap is measured with a feeler gauge to determine the pump minimum stroke.

SoCal250

Stacy, you can find oil pump info including the marks mentioned by Striker and the pump stroke clearance mentioned by Arrow, in The Tech Library section under "Yamaha Autolube Oil Pump"

Also, here are some manual pages to assist you.
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

rlgrantjr

First post after a long time away and a little off topic, but I had the stock roll pin fall out on a ride with predictable results, a hard seizure.  I replaced it with a new longer one and it's easy to measure occasionally to make sure it stays put.

Stacy1968