Recent posts

#61

Haus of Projects / Re: Need help on project

Last post by SoCal250 - February 14, 2026, 10:19:32 PM

Why are you wanting to remove or bypass the pump? You're going to create more work for yourself (and likely more headaches down the road) than just hooking it up and running it.

Oil tank hose (tank to pump) 90445-09122-00
Oil feed hose (pump to carbs) 90445-05M07-00  One package will do both sides on a RD400 if the tank is in the stock location.
Bleed the pump with the screw on the side of the pump housing. When no more bubbles appear you're done.

Here's where the pump distribution lines connect. (I reused the pics from 2steve's previous post to illustrate the location of the oil lines on the carb bodies.)

Right side


Left side

#62

Haus of Projects / Re: Need help on project

Last post by Tropic-al - February 14, 2026, 09:16:41 PM

Hi all. I'm back at it after Holidays, family visits, etc. Think I have everything to start it. One nagging question is what do I disconnect and/or plug at carburetors to not use the auto lube pump and run with pre mix ?? Pump is installed where it goes with no cables or hoses leading to it as of now. Will it spin and seize as there is no oil to it ?
Later on after everything is running smoothly i will connect the auto lube system.
Hope this is not a too confusing request. 

#63

eBay/FB Marketplace/Craigslist watch / DS7 for sale in Rock Hill SC

Last post by BlueR32 - February 14, 2026, 07:52:01 PM

In your back yard M in SC. Do you know the seller?
https://www.facebook.com/marketplace/item/1231083255181888/?ref=browse_tab&referral_code=marketplace_top_picks&referral_story_type=top_picks

#64

General Chatter / Re: Chance to pick up a Suzuki...

Last post by m in sc - February 14, 2026, 04:26:18 PM

who says it has to back 100% stock. 

#65

General Chatter / Re: Chance to pick up a Suzuki...

Last post by RDnuTZ - February 14, 2026, 01:28:18 PM

that 1 has the extremely rare value adding Vise Grip shifter on it!

#66

General Chatter / Cohn Racers Grom-aha 125

Last post by SoCal250 - February 14, 2026, 12:33:22 PM

https://www.bikeexif.com/honda-grom-street-racer

YZ125 2-stroke power and a modified NS400R/Freddie Spencer tribute livery

#67

Turning Wrenches / Re: Most used gear oil and 2st...

Last post by Kawtriplefreak - February 14, 2026, 11:56:32 AM

I will throw my hat in the ring. I use Lucas 80/90 in all my 2 stroke transmissions with good results over many years of hard street miles. I was a Klotz man for both premix and injector oil for many years and loved it until my research indicated that it contains little to no corrosion inhibitors and my bikes set a lot.
I switched to Blue Marble oil for years also with great results. Recently it has become unavailable. Now I am running Lucas semi-synthetic. It is reasonable in price and available locally. I am of the opinion that almost all of modern 2 stroke oils are superior to what our 2 strokes were designed to run on.

#68

General Chatter / Chance to pick up a Suzuki S32...

Last post by Simoniz - February 14, 2026, 11:00:00 AM

This has come up for sale 25 miles away from here, a 1966 Suzuki S32 Olympian. Missing a lot of parts so probably a money pit I am never likely to finish reviving. No title, no key, etc.

Yay or nay?

Anybody have a seat or side panels for one of these?

#69

Turning Wrenches / Re: Most used gear oil and 2st...

Last post by bitzz - February 14, 2026, 10:20:48 AM

As I understand it, you want the higher levels of ZDDP on any non-roller cam valvetrain.

You WANT about 1100-1200 PPM ZDDP. Too much ZDDP is a BAD thing.
Most motorcycle oils have about that level of ZDDP, any car oil advertising elevated ZDDP levels should have that much ZDDP. "Normal" car oil has about 800-900 PPM. ZDDP clogs car cat converters.
ZDDP is a lubricant of "last resort", if all else fails, there's still ZDDP... or boron or .... The idea is if you wipe all the oil off a metal surface (run out of oil), there is still a coat of ZDDP. You don't WANT to use the ZDDP... but it coats all metal surfaces, not just cam followers, mains and big ends too.
ZDDP is not the be all and end all of oil choices.

And the two things that have changed the most since these bikes were built is oil and tires. When these bikes were built; there was no "gear lube" and they were designed to use Reg 30 oil in the trans, not because it was GOOD, but because it was available everywhere. Gear lube is BETTER... you can build a gear lube with more sheer and less lubricity than a motor oil, that works better in a transmission.
IF you are going to run gear lube: you MUST use GL4, nothing else (use GL3 if you can find it, but GL3 was superseded by GL4). GL4 has lower levels of sulfur, the bright metal in the trans doesn't like sulfur. So no GL4/GL5... must be GL4.
Viscosity is rated differently in gear lube than motor oil... so a 75-80 gear lube is about the same viscosity as a reg 30 motor oil... about.

#70

eBay/FB Marketplace/Craigslist watch / Re: FB RD400 (Well At Least th...

Last post by RDnuTZ - February 14, 2026, 09:57:01 AM

WHY?