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2 strokes on overrev with closed throttle as well as the engine being driven by a wheel and rider or a drum on a Dyno do not get any significant...

Good question where the limits are in diffrent Races:msn-wink: Liedolsheim 8H wide open Throttle...think the limits are diffrent to freetech50 ...

what a fucking leper. What these clowns dont think of it the people in the car are just going from a to b, don't like driving, don't want to drive,...

Contributing? He was overtaking in the face of oncoming traffic on a road that was barely wide enough for two cars! He was totally at fault,even...

Pics of the dead 4140 prehard crank.

While we are on the subject of cranks and "reliability" .... These are "motorized bicycle" cranks for a 90cc single speed direct drive kart track...

:rolleyes: https://www.youtube.com/shorts/z2DDZtHwx-k

Edward Prince of Wales meeting returned soldiers, 1920 1920 Prince of Wales arrives for New Zealand tour King George V’s son, Edward, Prince of...

The only help with tolerances etc I can give I learnt from Curt at Hot Rods, the big end clearance should be 1 micron per pin mm ie 20mm pin = 0.02...

:) wobb Quality of Parts! tolerances ... roundnes ...axis...diameter...parallelity Todays motul 800 for street/racing is often used in bikes...

Question about Michelin Road Pilot 5 if anyone can answer. Sons Street trip has one on the front. Wheel was removed to replace fork seals. Tire does...

Thats Rachel Riley, who is memorable for other reasons (beside maths ability)

Is that the chick off Countdown?

Rachel Hurley has been publishing a 10 part series about trump. The latest part 5 - how deutsche bank financed him when no-one else would. ...

Honda (4 strokes, sorry) were running tiny bore and stroke roller crank engines 125cc fives, 250cc sixes) at 18 - 20,000 rpms back in the 60s. I...

I believe three things were in play with the KZ engines. Firstly was the big end pin diameter, this was like many engines of the 125 size was 20mm (...

1979 Blair Peach killed in London New Zealander Blair Peach died after a clash between police and protesters at an anti-fascism rally in Southall,...

Wobbly and Frits, Not Diameter of Bore ore Bolt Big end, some use 17mm..."quality " of components ;)...foregive me if i dont want to talk about to...

50cc big end pins are Ø15 or Ø16 mm; that is roughly equivalent to 22 mm for a 125cc engine. The RSA had a 24 mm big-end pin, which posed no...

We ran our 26 cc, 28 mm stroke Zenoahs up to 25,000 rpm during testing. That's around 23 m/sec. It was only for a short time on the water, though. ...

Some of the aftermarket expensive 50cc " racing" cranks are very pure in quality...pure shit :(

Congratulations Neil :woohoo:

You are all in trouble now, retired as of this week, parts are being sourced as we speak (read) for the 'ultimate' 100cc twostroke. Haha, I'm full of...

I am surprised as his is the first decent study you have ever posted in the history of this thread out of hundreds of crap you have posted before....

Gents, you are comparing high quality TM race parts developed as a package since ages for a specific race engine to Derbi aftermarket stuff. While...

I have the same question. I do know that things do not scale linearly with engine size, maybe the issue is the big-end bearing inertia? And in a...