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Author Topic: Jetting and clutching 1980 ltd  (Read 3293 times)

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jtervaniemi

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Jetting and clutching 1980 ltd
« on: January 16, 2018, 10:23:25 AM »
Hi
Anyone have the clutch and jetting chart for 1980 ltd 4/6?
I think my new Ltd have wrong setup.
There is 140 on both pj and main jets, pilot is 35.

The ramps is marked E and yellow spring.
I read about hi engagement J ramps, is it something to have?
I'm not going to dragrace but I want power from scratch!
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gixxer6

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Re: Jetting and clutching 1980 ltd
« Reply #1 on: January 16, 2018, 10:30:22 AM »
The 4/6 came with a black spring and F ramps in the primary.  Sounds like you have a 79' Invader clutch installed. 

Are you sure you have the original 4/6 motor?  I've seen them with standard Invader motors swapped in because it can be difficult to find good 4/6 motor parts. 
« Last Edit: January 16, 2018, 10:33:10 AM by gixxer6 »
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jtervaniemi

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Re: Jetting and clutching 1980 ltd
« Reply #2 on: January 16, 2018, 11:28:48 AM »
Ok, so the clutch setup isn't correct..
I have a 79 invader 440 it hasn't that "bend" besides the intake. There is stamped R2934 on the left side of the left cylinder.
Bottom and top are painted black, cylinders non painted.
Se picture.
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jtervaniemi

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Re: Jetting and clutching 1980 ltd
« Reply #3 on: January 16, 2018, 11:33:28 AM »
I saw this on the forum somewhere, but it is from 81..
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jtervaniemi

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Re: Jetting and clutching 1980 ltd
« Reply #4 on: January 16, 2018, 11:34:59 AM »
Engine bay
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jtervaniemi

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Re: Jetting and clutching 1980 ltd
« Reply #5 on: January 16, 2018, 11:47:30 AM »
When I opened the carburetors the nozzle with o-ring was missing and the main was mounted in that place??
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gixxer6

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Re: Jetting and clutching 1980 ltd
« Reply #6 on: January 16, 2018, 12:13:20 PM »
Yes, that is definitely a 4/6 motor. 

Looks like someone tried to convert your PJ carbs to standard? 
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jtervaniemi

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Re: Jetting and clutching 1980 ltd
« Reply #7 on: January 16, 2018, 01:13:30 PM »
Yes I think so..  :-\
I'm ordering new nozzles with o-rings today.
Any ideas ideas of correct jetting?
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gixxer6

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Re: Jetting and clutching 1980 ltd
« Reply #8 on: January 16, 2018, 01:46:55 PM »
Someone with a 4/6 FSM will need to chime in...
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jtervaniemi

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Re: Jetting and clutching 1980 ltd
« Reply #9 on: January 16, 2018, 03:42:08 PM »
Yes, need some help..
Found this on eBay, is it the correct parts manual?
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gixxer6

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Re: Jetting and clutching 1980 ltd
« Reply #10 on: January 16, 2018, 05:57:42 PM »
Yes that is the correct parts book. 

I found my manual. 

Pilot 35
Main 140
Econo jet 120
Needle jet p6
Needle 6dh7-3
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Interceptor398

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Re: Jetting and clutching 1980 ltd
« Reply #11 on: January 16, 2018, 07:15:50 PM »
My info has the mains at 130 and the carbs are marked 36/90.  The 130 mains and the needle jet at P9 is from my cheat sheet so there is a small chance it may not be correct???

« Last Edit: January 17, 2018, 08:05:58 AM by Interceptor398 »
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gixxer6

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Re: Jetting and clutching 1980 ltd
« Reply #12 on: January 16, 2018, 07:40:19 PM »
I looked it up in my 4/6 parts book. 
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moz_21

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Re: Jetting and clutching 1980 ltd
« Reply #13 on: February 19, 2018, 12:25:55 PM »
Quote from: jtervaniemi on January 16, 2018, 11:47:30 AM
When I opened the carburetors the nozzle with o-ring was missing and the main was mounted in that place??

You're missing the brass washer under the nozzle. Could be an issue.

I just order the correct jets for mine, had 150 mains and having WOT issues now that I've fixed the leaking crank seal.
See attachment from my 1980 Invader 4/6 manual. I'll go get the clutch chart if you need it.
« Last Edit: February 19, 2018, 12:27:28 PM by moz_21 »
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