Recent posts

#1

General Chatter / Re: RIP Frame Maker

Last post by busa1300 - Today at 04:09:57 AM

Very sorry to hear that.
I had first seen the bikes he was building on the customfighters forum many years ago, and seriously impressed then by the bikes he was thinking up. Hopefully he wasn't suffering long.

#2

General Chatter / Re: RIP Frame Maker

Last post by pdxjim - Today at 01:16:45 AM

This just blows my mind.

Riding dirtbikes has always seemed so safe compared to street riding.

Although we never met, Julian seemed like such a nice and incredibly talented soul.

Each day we have here on Earth together is a blessing not to be taken for granted.

#3

Turning Wrenches / Re: Pro-X piston ring question

Last post by rdsarefun - May 19, 2024, 08:26:14 PM

Fired it up today, engine seems very lethargic as compared to before. Let it warm up 5 minutes, going to retorque cylinder head to 15 ft pounds and then run again, set timing.  Head was modified (squish band),  assuming I need to readjust timing.

#4

Show Off / Re: Gap pics ,, killboy, from ...

Last post by SoCal250 - May 19, 2024, 01:05:47 PM

Cool pics Looks like a good time

#5

Show Off / Re: Gap pics ,, killboy, from ...

Last post by msr - May 19, 2024, 10:21:31 AM

Sweeeeet. I bought one of the 400 I need to put up here.

[US $45.99/ea]

#6

eBay/FB Marketplace/Craigslist watch / Re: EBAY INSANITY (sticky thre...

Last post by SoCal250 - May 18, 2024, 11:35:53 PM

1 pilot jet for $46.00!

https://www.ebay.com/itm/276471647811
New OEM Yamaha 367-14342-22-00 Pilot Jet #44 NOS
"Pilot Jet #44 is new and in good condition, not in original packaging."
US $45.99/ea


The # 48 is only $35.00
New OEM Yamaha 396-14342-24-00 Pilot Jet #48 NOS
US $34.99

#7

General Chatter / Re: RIP Frame Maker

Last post by SoCal250 - May 18, 2024, 04:14:53 PM

Wow, this is terrible and very sad news. Ken, I am deeply sorry for the loss of your friend. He was an amazing guy. My condolences to his friends and family.

#8

Turning Wrenches / Re: Pro-X piston ring question

Last post by rdsarefun - May 18, 2024, 11:52:30 AM

Thanks Mark, i managed to upload some pics and you can see that it looks nothing like the pic in generic instructions.  I made a typo though, the second ring is thicker, wanted to clarify for future reference  Second ring is .059",  top ring is .046"

Thanks, Brian

#9

Turning Wrenches / Re: Pro-X piston ring question

Last post by m in sc - May 18, 2024, 11:45:55 AM

they typically go under the second ring, most people leave them out. its just an expander ring, not an oil expander ring.

#10

Turning Wrenches / Pro-X piston ring question

Last post by rdsarefun - May 18, 2024, 11:24:56 AM

So I am finally getting around to replacing my Top end with my Pro-X pistons and modified cylinders from Bill Bune (that I had received late last year). This is for my 75 RD350.  I has 2 rings and a oil expander (assuming this is what the corrugated ring is- does not look like the one in the instructions, stating for 4 stroke only, attempting to upload a pic but phone is temper-mental today)).  I did not receive any instructions and found a generic set online. It was very difficult to see the ring profile edge (to determine what was top and what was second ring) so I measured these with a set of calipers and measured the ring lands within the pistons with a feeler gauge and found that the top is thicker (.059") and the 2nd ring is thinner (.046"), each marked with a "T" so I can install correctly.  My question is that I do not see where the expander is used, assuming it goes behind the top ring due to width being .056" thickness.  can anyone confirm this is where the oil expander goes, behind the top ring or is it not used at all?