Diff'rent Strokers

[thump566]

[thump566]

Just noticed my SDR Oil Pump is marked 1KT.

The SDR part # is 2TV - 13101-00
The 1KT part # is 1KT - 13101-00

Is this a just a recognised upgrade or replacement, or have I got the wrong Oil Pump to my bike by a previous owner? Not sure how it might affect the SDR. ?

Just wondering if I should be trying to source the 2TV oil pump just to be safe?

[thump566]

I understand that the only difference is that the 1KT pump has 2 feeds so presumably the previous owner sorted that.

The engine is still with the builder, I feel guilty dumping 2 boxes of bits on him bit I literally did not have the time. It's a total rebuild from the bare crankcases to include the overhauled oil pump and tacho drive from the DT200R if I recall correctly.

I got carried away and duplicated a number of oil seals and gaskets however spares are rarely a bad thing to have in the drawer. Will give the chap a call in a couple of weeks, I did say there was no hurry and to fit me in when he could. I has a rebuild done by him on another Yamaha so wanted him to do the SDR despite the fact he doesn't do engine rebuild nowadays by choice so I won't be pressing him.

Hoping to show completed engine pictures soon

[thump566]

Ok, I picked up my SDR engine last week from the builder (I had no time to sort it myself) . I did say originally that I was not in a hurry for it but wasn't anticipating 3 months, anyhow its back in the mancave.

2 initial items to address ...

The carb didn't get ultrasonically cleaned so an excuse to experiment with the model I obtained a while back.

I had provided all the DT200 parts to drive a rev counter, which should in theory be a straight fit however the gear would not enable the casing to fit back on snugly so the builder left it out rather than machine the casing. I recall other SDR owners have managed this upgrade, did anyone else end up machining the casings at all?

I am in the process of finalising the tidying up of the rolling chassis and a lot of cycle parts then systematically performing a dry build. I intend to repaint the SDR closely to the OEM Melting Green, prompted by the original tank having rusted through and obtaining a replacement which is a different colour.

I envisage a few more challenges during the build but for now the engine is back in one peice and the totally overhauled Oil pump is due back soon, Thank you Santa.

[James P]

Strange about the tacho gears Ron - I have several SDR engine cases and clutch covers and all of them are pre-machined to accommodate the tacho drive gear parts. Also, I had no difficulty fitting the drive gears when I built the engine for my SDR.
Perhaps there is a burr on the steel shaft for the plastic ring gear which prevents it from being inserted to the necessary depth in either the engine case or the clutch cover...? Otherwise, could the shaft be too long (i.e. not the correct part)...? The 37F shaft I used was 8mm diameter, 55mm long. There is also a 17F shaft (a DT125 part, also used in TZR50 and TZR125 models), but I can't confirm its dimensions.

I can't offer any insight into the oil pump problem (I don't use them), but would strongly recommend using the correct one to ensure correct volume/rate of oil delivery. Otherwise, you could possibly do some research to find out how to set up the 1KT pump to deliver the same quantity of oil as the 2TV pump.
If you want to use an oil pump, I think it essential to ensure that it will deliver the correct (or at least adequate) quantity of oil. Too little oil and you'll likely have to rebuild the engine again. Too much oil may (depending on the level of excess) hamper performance...or may also necessitate another engine rebuild!

Regards,
James

[thump566]

Hi James.
I am currently assembling the rolling chassis after rebuilding the front forks (the wheels will likely get powder-coated once the rest is up and running).

The motor is still out and dry so I will have another look at the tacho mechanism, it would be could to install it if possible. Might pass it by a mate who is a retired engineer who can machine just about anything.

The Oil pump should be fine, its been overhauled and refurbed by a guy that specialises in them. Its been taken apart, vapour blasted and rebuilt with genuine Yamaha OEM internals.

The bike refurb is taking longer than hoped as I'm systematically cleaning up a multitude of 28 year old parts.

Its a marathon not a sprint. :lol: