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Makotosun

Thicker Head Gasket for the RT1,2,3 to ease starting.

  • 1971DT250
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Replied by 1971DT250 on topic Thicker Head Gasket for the RT1,2,3 to ease starting.

All of my 360 riders have the decomp valve in the front of the cylinder plus an auxiliary decomp valve from Harley Davidson in the spare spark plug hole.

But I still need more help as I get older. I don't have the leg strength. So this helps a lot by reducing the strength needed.

I can see the need some day to have to go riding with someone younger who can start the bikes for me. I still love riding the 360.
The hours spent riding my Enduros is not deducted from my life span.
The following user(s) Liked this Post: Sneezles61
Last edit: 21 Feb 2023 13:14 by 1971DT250.
21 Feb 2023 13:12 #11

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Replied by Pete-RT1 on topic Thicker Head Gasket for the RT1,2,3 to ease starting.

Martin, as far as I know 1970 model was the only one without a decomp.
Yamaha CT1 007
Yamaha CT1-B The Greenie
Yamaha CT1-B The Doppelgänger
Yamaha CT1-C
Yamaha AT1-C
2020 Honda CB500X
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22 Feb 2023 03:21 #12

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Replied by 1971DT250 on topic Thicker Head Gasket for the RT1,2,3 to ease starting.

msavitt said:
does the RT1 have a compression release like the ones on my DT360 or 400?
these seem to really work well when adjusted properly, I know they make a big difference because I have tested the kick with cable slacked out

The '74 360 and later 400s have a larger diameter decomp valve. This was also on the MX360. Bulletin # 381 is for the new replacement cylinder for the RT2/RT3 which has the same larger decomp valve. The hole exiting the cylinder wall is 6mm instead of 4.5mm. So it makes sense that the DT360 and 400 is more effective and more noticeable when it is not working. I have found that when the hole gets plugged on my RT3 it is not that noticeable.

I found a NOS RT3 cylinder for the larger decomp valve. I plan to try it on one of my RT3s.

 
 
The hours spent riding my Enduros is not deducted from my life span.
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Last edit: 22 Feb 2023 05:10 by 1971DT250.
22 Feb 2023 05:09 #13

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Replied by Sneezles61 on topic Thicker Head Gasket for the RT1,2,3 to ease starting.

Thank you for the picture… I plan to pull my engine in March… I’ll pay attention.. rt2
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22 Feb 2023 10:46 #14

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