Beginning a build, what would you do?

[SoCal250]

I would keep the oil pump. They're reliable and it will simplify your life.
Rebuild it with new seals if needed. Easy to do and the rebuild kit is available from Economy Cycle.

[svgarage]

I would keep the oil pump. They're reliable and it will simplify your life.
Rebuild it with new seals if needed. Easy to do and the rebuild kit is available from Economy Cycle.

I second the motion. HVC sells the kits too. It's a good chance to make sure everything is set up correctly, so that your ratio is good.

[Jspooner]

I would keep the oil pump. They're reliable and it will simplify your life.
Rebuild it with new seals if needed. Easy to do and the rebuild kit is available from Economy Cycle.

I second the motion. HVC sells the kits too. It's a good chance to make sure everything is set up correctly, so that your ratio is good.

I third that, keep the pump. No reason to get rid of it in my opinion. I even run one on my TZ/LC motored TZ replica. On a street bike you will never notice the performance gain or loss, but you will really appreciate the pump when you're at the pump.

[m in sc]

4th vote for the pump as well. I have 3 premix bikes for completely different reasons, and nome of them are worrying about failures or performance reasons. I have 6 others on the oil pump.

[Kawtriplefreak]

5th vote for keeping the oil pump. Pre-mix on the street is a never ending PITA. The pumps are reliable and if you are uncomfortable rebuilding your own (if it needs it) there are lots of people doing it like John at Economy Cycle.

https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/engine-related/oil-pump/oil-pump-rebuild-service-rds-r5-ds7-rzs/

[svgarage]

5th vote for keeping the oil pump. Pre-mix on the street is a never ending PITA. The pumps are reliable and if you are uncomfortable rebuilding your own (if it needs it) there are lots of people doing it like John at Economy Cycle.

https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/engine-related/oil-pump/oil-pump-rebuild-service-rds-r5-ds7-rzs/

They're actually a piece of cake to rebuild. Identify your pump and make sure you get the correct kit. I think a lot of the kits give extra gaskets to cover an array of models. Take your time and take pictures.

[Webber]

6 vs 0 for the keeping the pump. Looks like that's the plan!

[Yamanatic]

TR3 top end bolts right on; virtually identical to TZ350 porting, and no extra complexity or weight from a cooling system. TR3 cylinders and heads come up for sale fairly regularly and are not as outrageous as a TZ/RZ cylinder, water pump, radiator, and plumbing. It would be a total wheelie machine!

Warren