M4 Full Exhaust System Fitted - Suzuki GSXS1000 Forum
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post #1 of 9 Old 12-10-2018, 08:30 AM Thread Starter
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M4 Full Exhaust System Fitted

I've fitted the M4 full system on Sunday afternoon as the weather was lousy. Sounds very nice. Not remapped as yet but still runs perfectly fine as is. Thoughts are that they have engineered the tube lengths of both primaries and secondaries very well to allow the bike to run well without a remap.

Points to note for anyone fitting the M4 Exhaust.
1. You will need their silencer, the secondaries do not terminate in the same place as the standard exhaust. A short adapter pipe would be necessary to fit any other aftermarket silencer.
2. The supplied arm to fit to the servo motor for the exhaust valve on the standard system is easy to fit but rear shock has to be removed to remove the servo and fit the arm.
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post #2 of 9 Old 12-11-2018, 10:03 PM
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I feel the M4 headers are the best aftermarket headers for a street bike, everything else has very short secondaries affecting the mid range adversely (or the race like Yohimura 4-1), although I still built my own (even longer secondaries and a bigger bore)

Weird that the slip on they sell is not the same as the one that comes with the full system.

I got my girlfriend to help remove the servo, it can be done without removing the rear shock if you small enough hands ;-)
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post #3 of 9 Old 12-12-2018, 02:18 AM Thread Starter
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Quote:
Originally Posted by PhuketPaul View Post
I feel the M4 headers are the best aftermarket headers for a street bike, everything else has very short secondaries affecting the mid range adversely (or the race like Yohimura 4-1), although I still built my own (even longer secondaries and a bigger bore)

Weird that the slip on they sell is not the same as the one that comes with the full system.

I got my girlfriend to help remove the servo, it can be done without removing the rear shock if you small enough hands ;-)
I was a bit dissapointed that the exhaust secondaries terminate at a different point to the standard system, I was hoping to usr the Yoshimura GP6 end can I'd bought which I do like the look of on the bike, however the M4 silencer it is.
The M4 Slip on must be a dedicated aftermarket silencer as the M4 secondaries are also a bigger bore than the standard system and the Silencer in the system kit is a slip on fit to the secondaries. To fit any other silencer I'll have to make up a very short "S" link to allow fitment. I'll put some pictures of it up so that you can see how it is set up.

4 wheels move the body, but 2 wheels move the soul.

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Last edited by Robbieben; 12-12-2018 at 02:20 AM.
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post #4 of 9 Old 12-12-2018, 05:14 AM
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I got my girlfriend to help remove the servo
marry her
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post #5 of 9 Old 12-12-2018, 08:44 AM
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I was also able to remove the Servo without removing the shock, and I have big hands!
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post #6 of 9 Old 12-12-2018, 08:54 AM
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Get the ECU flashed and just remove all the Servo junk and while you are at it vent the tank to the ground and remove the charcoal cannister to.It'll run better with either a mapped flashed ecu or power commander fitted to a flashed ecu with stock mapping still on it. The flash can get rid of the O2, PAIR, SET valve BS and no FI light or codes thrown. Plus you will get full power out of the exhaust. Also throw in a nice race air filter (not a K&N) but something like a race BMC. Remove the air box restrictor plate and air intake opening things near frame inlet openings. I removed the servo motor without removing my shock but I have very small hands. The noise insert won't work well on the exhaust with a race tune. It robs power when in that state of tune. It is loud with it out though just wear earplugs.

Feel the power!
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post #7 of 9 Old 12-12-2018, 10:25 AM Thread Starter
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I've removed the airbox restrictor plate, other bits to follow over the winter before I get the ECU flashed, just waiting for confirmation on some new cams, if they are sorted it will be ported and gas flowed and a few other bits before the reflash.

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post #8 of 9 Old 12-12-2018, 11:18 AM
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Quote:
Originally Posted by roy826 View Post
Get the ECU flashed and just remove all the Servo junk and while you are at it vent the tank to the ground and remove the charcoal cannister to.
Feel the power!
He is in the UK shouldn't have a charcoal canister
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post #9 of 9 Old 12-13-2018, 08:32 AM
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He is in the UK shouldn't have a charcoal canister
well darn we get all the good stuff to fill a trash can in the US
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