Guess the Engine

[Yorick]

FB_IMG_1642446990430.jpg (60.84 KiB) Viewed 199 times

[Yorick]

You seem to have converted it to 175 LC

Not mine. Just seen it on an FB racing group.

But I did put a rod through the barrel on my RD400.

[Le_Fromage_Grande]

It's a power valve - I'm in the same face berk group.
Very impressive, snapping a rod, usually the piston disintegrates before the rod snaps.

[Yorick]

It's a power valve - I'm in the same face berk group.
Very impressive, snapping a rod, usually the piston disintegrates before the rod snaps.

Yes, I was waiting

[KungFooBob]

Let do another...

[Yorick]

Let do another...

That's just being silly

[Le_Fromage_Grande]

Let do another...

Piston looks Honda

[Yorick]

Let do another...

Piston looks Honda

4 stroke

[KungFooBob]

Seized it solid at 90mph on the M18.

Pic is before I cleaned it up, was looking quite nice by the time it blew up.

[Le_Fromage_Grande]

Now I know where I've seen that piston design before, X7, I used to have one where most of the crown had disintergrated.

I've also seized an XR250.

[KungFooBob]

I had my XBR500 nip up, but it freed off with minimal scoring... to the Wiseco Hi Comp XR500 piston I'd fitted the week before.

[Le_Fromage_Grande]

The XR seized riding across a ploughed field of heavy clay soil, I cleaned the clay off and tried kicking it over, it was seized solid, so I kicked it harder and it started, I rode back across the field at a more sedate pace, it was probably another 500 miles before I got the engine rebuilt, I think the bill was under £150 including a new piston rings and can chain. Super little bike that really is one I should never have sold.

[Yorick]

We all raced with a finger on the clutch

Usually let go when you shut off throttle at end of straight

[Le_Fromage_Grande]

We all raced with a finger on the clutch

Usually let go when you shut off throttle at end of straight

Because the mixture leans off while the piston is hot, making it even hotter.

[Yorick]

We all raced with a finger on the clutch

Usually let go when you shut off throttle at end of straight

Because the mixture leans off while the piston is hot, making it even hotter.

Ed Zackerly.

[Tricky]

We all raced with a finger on the clutch

Usually let go when you shut off throttle at end of straight

Aye, and some of us still do - although I consciously try not to , just about every trackday pic I see of me still shows me with a finger on the clutch lever.
one of my fastest ever racing crashes was exactly at the point you describe just as I sat up at the end of the Revett straight- didn't manage to catch that one in time !