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General Category => General Discussion => Topic started by: Macs80hp440 on January 20, 2016, 09:50:48 PM

Title: pipe exhaust muffler interchange or alternative
Post by: Macs80hp440 on January 20, 2016, 09:50:48 PM

Greetings folks,  I'm hoping somebody with much more experience might have figured this out.  I'm wondering what other pipes will interchange (fit) with invaders/intruders.  I thought the John Deere Liquifire sleds would fit, but I'm not sure looking at pictures.

Maybe other sled pipes will fit?  Has anybody tried?

OR - does anyone have a '80s pipe for Invader/Intruder...the one with the extra expansion tank on the end. 

Thank you for the consideration.

Title: Re: pipe exhaust muffler interchange or alternative
Post by: Lloyd (ljm) on January 21, 2016, 11:08:32 AM

 A Deere one might fit with some modifications. But I think the later Kawasaki pipes are a better pipe.

 I know Kawasaki pipes won't fit in a Deere belly pan, But a Deere one should fit in an Invader pan.

Title: Re: pipe exhaust muffler interchange or alternative
Post by: Gilson435 on January 21, 2016, 11:12:05 AM

I see there is a NOS one on Ebay...

Title: Re: pipe exhaust muffler interchange or alternative
Post by: Vader on January 22, 2016, 12:16:43 AM

If I take the pipe from my 81 Invader and put it in my 79 Invader, are there any changes in carb tuning to go with the different pipe design?

Title: Re: pipe exhaust muffler interchange or alternative
Post by: rminier on January 22, 2016, 08:41:36 AM

 1978 and 1979 Invaders...both the 340's and 440's used tuned muffler 39083-3501.
 The 1980 Invader (440 only) changed to the improved 39083-3506 muffler, which was also used in the 1981 440 Invader.
 The 1980 340 Invader continued to use the original 39083-3501.
 The newer 3506 has a bulge on the underside, and was advertised to add 5% more power to the 440...roughly 3 or 3 1/2 HP.

Vader, the jetting for the 440 Invaders remained exactly the same during its 4 year production run, 1978 through 1981, so I'm pretty sure you can interchange the pipes without any worries.

Title: Re: pipe exhaust muffler interchange or alternative
Post by: Vader on January 22, 2016, 11:39:44 AM

Sounds good, thanks for all the info!

Title: Re: pipe exhaust muffler interchange or alternative
Post by: gixxer6 on January 22, 2016, 02:16:05 PM

4/6 LTD twin pipes will fit, but performance increase is negligible.  Kawasaki made git kit twin pipes, these with porting will make a good improvement.  Aaen makes twin pipes for the invader also. 

Title: Re: pipe exhaust muffler interchange or alternative
Post by: Vader on January 22, 2016, 05:00:23 PM

In Quebec, we are not allowed to use aftermarket pipes due to noise regulations.  >:( (Only applies to sleds made after 1971)

Title: Re: pipe exhaust muffler interchange or alternative
Post by: Macs80hp440 on January 26, 2016, 04:56:28 AM

Asked and answered.  Thanks for the quick reply.  I found a couple of original pipes nearby home.  But, it is always nice to know alternatives as I hope to keep this Invader running smooth for a long time.