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For Sale / Re: Collection for sale

« on: Today at 10:13:10 am »

The link doesn't work for me :-(

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General Discussion / Re: New Members

« on: March 14, 2025, 02:31:02 pm »

Quote from: Wasp on March 14, 2025, 10:46:47 am

I happen to notice the latest new member Kurtas. Out of curiosity I checked the date , he joined in 2022 . That means no new members since 2022. What is going on ?

Covid must have killed the old timers ;-)

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Tech Talk / Re: PVL Timing

« on: March 14, 2025, 07:19:32 am »

Quote from: 2T on March 13, 2025, 08:15:08 pm

What's the best way to apply threebond to the crankcase without putting too much or too little on?

I put a drop on the end of my finger, enough to cover about 60mm at a time. Always applied 1104 like that.

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Tech Talk / Re: PVL Timing

« on: March 05, 2025, 08:06:42 pm »

I just tap the seals in with a hammer, if they don't slip in with a finger push, never had an issue in 50 years :-)

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Tech Talk / Re: PVL Timing

« on: February 20, 2025, 04:05:59 pm »

Yes "With the squish angle being so large it borders on eliminating it as a squish", squish helps cooling by not exposing so much of the cylinder-head during combustion.

This site has some things to consider ....https://kdxrider.net/forums/viewtopic.php?t=26022

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Tech Talk / Re: PVL Timing

« on: February 20, 2025, 08:52:39 am »

Good pics Rob, thanks. You say the "squish angle is 28 degrees", what is the angle of the piston crown? I'm thinking that if the 'head squish angle' does not match the piston crown angle closely ( I think an increase in clearance of .5mm towards the centre of the bore, is good), the benefits of 'squish' would not be realized?

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Tech Talk / Re: PVL Timing

« on: February 19, 2025, 09:51:23 am »

Hey Rob, can you post a pic of your head, and list the cc of the head only.

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Tech Talk / Re: 2-stroke piston window, rear boost port.

« on: January 30, 2025, 10:39:27 pm »

Hi John,

Obviously, a lot of water has flowed under the bridge since you started this thread. I am wondering if you would now recommend adding windows in a 500cc piston to help lower piston/combustion chamber temps and are there any downsides?

Also, do you still have those pics?

Cheers,
Rob

[/quote]

G'day Rob, I never ran the CR on the dyno, so I can't talk on HP, I also did not run any temp strips on the engine, nor use a temp gun on it, I can tell you that my CR did not ping, it was very high compression, enough to split the plastic cup in my artificial knee. CR500RE's were infamous for pinging, if I ever have a bike that has a rear boost port, I'd put a window in the piston, if it doesn't have one.

I'll see if I can find some pics, send me an email; [email protected]

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Tech Talk / Re: PVL Timing

« on: January 23, 2025, 07:18:29 pm »

Quote from: Wasp on January 23, 2025, 05:03:48 pm

You are not the only one , Hoony. I broke at least 3 kickstarter gears on my CR 500 , before I learned to be more gentle. Unlike the 540 KTM , the Honda gears are more fragile.Most of the times we push started the Honda , problem solved. While riding ,keep it singing and have one finger on the clutch leaver ,so you can fang it out of the corner.

My problem kick starting my CR500 was, splitting the teflon cup in my titanium knee.

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Tech Talk / Re: Spluttering When Rich - What's Actually Happening in There?

« on: January 10, 2025, 08:40:54 am »

The issues that could arise ....

Fouled plug.
Blocked baffles in the exhaust.
Excessive carbon build-up behind rings.
Ring might get jammed in the grooves.

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