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Discussion Starter · #1 ·
My 109 is Popping through the left air cleaner when down shifting from 5th to 4rd or 4th to 3rd. As I shift down and clear the engine (wrap the throttle) I get a engine miss/hiss/backfire out of the left air cleaner. I called my dealer and he told me either bad gas or a bad spark plug, so yesterday I changed all 4 plugs and it still does it when it's warmed up. As for gas I tried various brands, it make no difference. I did notice that the rear outside cylinder (#2 ?) had a very fouly dark looking plug. After changing them all it still does it. My dealer told me that he would prefer that I get it through the 600-800 mile mark befor he remaps the injection system. I don't notice it when the motor is colder or at the start of a ride. It's embarrasing as hell when it does it.

Any one have a similar problem like this ? If so what's causing it ? Fuel system or ignition ?.

Wacky :dontknow:
 
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If what you are talking about is not very loud then Yes I think I've heard the same thing. Untill I put the windshield on I never heard it but with the windshield I hear a very faint "pop" when downshifting but only sometimes. It's not enough to worry me unless it gets worse.
 

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I notice once in a while that when I burp the throttle from idle it pops too. It does sound like I have bad gas but maybe it needs to be remapped. Going to call dealer tomorrow and see it he can do it. I have 1000 miles on it now.
 

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ditch said:
I notice once in a while that when I burp the throttle from idle it pops too. It does sound like I have bad gas but maybe it needs to be remapped. Going to call dealer tomorrow and see it he can do it. I have 1000 miles on it now.
 I have a slight stutter when opening the throttle off idle, not all the time. Its fine in gear though. It stumbled slightly one time while driving but the bike wasn't warm yet, and it wasn' t that bad. I have close to 1000 miles. When I get the manual I'll check synchronization of throttle bodies. To be kind to the bike in its early years I started running lucas top end oil [ 1/2 oz. to a tank ] and the slight stumble is non-existant. Also : If this was a 5.0 I'd be checking the TPS, do these bikes have tps' s on the throttle bodies ?Â
 
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z109r said:
 Also : If this was a 5.0 I'd be checking the TPS, do these bikes have tps' s on the throttle bodies ?Â
Throttle position sensors are pretty much a thing of the past. Most of that is done by the processor now. The only throttle control on Fords now is the IAC (Idle air control) and they go bad frequently. I also look for technology to eliminate them soon also.
 

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gradona said:
Throttle position sensors are pretty much a thing of the past.          Thankyou, so its a confirmed processor job on the bike as well ? We have emissions in Md., so I only buy pre obd II, have 2 SHO's, so they can't
fail me by simply plugging into the harness. :verymad: They don't give you the option of the rollers with obd II If they find a fault code in memory, you fail regardless of cars emissions. Unfortunately its about the money, not the air. P.S., don't clear the memory, you'll have to wait to have it retested. :eek:
 

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mine does the same.except both carbs and sometimes backfires.servicewriter said sounds normal.WHAT THE? got about 400 miles on it. salesman a little more reasonable said throttle bodies out of synch.suggested waiting until first tuneup
 

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Discussion Starter · #8 ·
Well it's good I suppose to know that it's not just me. I called my dealer today and he is contacting Suzuki tomorrow to see what they think. He said the same thing about the TB's being out of adjustment. My dealer also said that their waiting for the mapper box from Suzuki that's used to adjust the fuel injection. They said this is not an uncommon problem. Should be a simple fix they say.

Wacky
 

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Just think of how good those 109'ers will run once they get rid of the bugs and recalls. I'm waiting to hear one with straight pipes and torque cones installed for backpressure. What a carnivore!!!!!!
www.hellrisercustoms.com/oychoppa
 

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DRAGSTER said:
hey guy's,

        i do get that pooping sound from my exaust, its really disapointing, sound like harley's...anyways we discover by checking the ohm resistance from the spark plugs cap, the easy spark plugs to remove has about 10 000 ohm resistance, while the sparks plugs under the tank has only half of it...5000 ohm, now, is that normal? would that retained one of the spark plug even only 2/10 of a second behind the other....., would that explain while my engine does'nt feel like it's got MAXIMUM TORQUE BETWEEN 3500 - 5500, feel like i have to wait on the Rpm to pike-up to gains.....

       I've ask the question to my dealer, but since not everyone are maniac of mecanic and totally passion of engine, i have more faith in findind the problem with 700 hundreds m109r owner then one mecanic that thinks he knows it all........

       and .......i did have that pooping until a reach 500 miles.......would the fact that you hit the rev limiter to many times right in the middle of the rpm range would have affected 2 sparks plug cap.....so that their scrud up since........

       i've change 2 left air filters so far and got 4 brand new sparks plug, and try running the bike with 91 octance plus 7 octane boosts with nitromethane (racing fuel)......

Any of you can take a multimiter and check the spark plug cap on the easy side to remove, tell me if your bike has 5000 ohm or 10 000 ohm, but hey if your bike does some pooping, never mind, i want to know from guys that does NOT have that pooping (maybe they have race their engine to hit the LIMP MODE 20 times......)

                                                                              thanks,             Dragster

      I know this bike will be ahead between 2 light (300 feets) agains a CrouchRocket, but as it is ......i don't have i twist the handle from half to the end.....and it seems like their is no torque......like a V-Rod .........

                               Â
      A guys a know have done up a 1600cc harley, tunes it to their best, (5-6 guys togeter) and he said the bike had around 109 hp to the wheel (that's belt driven) and.... over 100 lbs torque.... and it was heavy, mean heavy heavy.......his son would take any supersport bike between light.....

         I Expect this M 109r tuned by engineer, when i done my own tuning this bike should have ov
:eek:
 

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Wacky174 said:
My 109 is Popping through the left air cleaner when down shifting from 5th to 4rd or 4th to 3rd. As I shift down and clear the engine (wrap the throttle) I get a engine miss/hiss/backfire out of the left air cleaner. I called my dealer and he told me either bad gas or a bad spark plug, so yesterday I changed all 4 plugs and it still does it when it's warmed up. As for gas I tried various brands, it make no difference. I did notice that the rear outside cylinder (#2 ?) had a very fouly dark looking plug. After changing them all it still does it. My dealer told me that he would prefer that I get it through the 600-800 mile mark befor he remaps the injection system. I don't notice it when the motor is colder or at the start of a ride. It's embarrasing as hell when it does it.

Any one have a similar problem like this ? If so what's causing it ? Fuel system or ignition ?.

Wacky  :dontknow:
Mine also has a popping (mild) when down shifting. This is normal for any bike equipped with a smog pump (afterburner) which the M109 does. It runs off engine vacuum and dumps air into the exhaust valve part of the engine after the gas has been burned. It helps to clean up emissions. The popping is perfectly normal and not harmful. If you put aftermarket pipes you will really hear it because the popping is not muffled so well. My Kawasaki did this until I removed it's afterburner. It's not hard to do. You'll need block off plates for the vacuum ports if you remove it. I don't know of anyone who makes them yet but I'm sure they will be out soon. Hope this helps.
 

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My Volusia did it as well, on the Volusia there was a pair valve. If it recall this right, this was a pollution control device that reburns the gas. You can bypass it on the Volusia easily. The popping also has absolutely no impact to performance.
I suspect the M109R has a similar device.
 

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Discussion Starter · #14 ·
Since I started the thread the popping has gotten worse. It's doing it almost every down shift. Their's definetly something wrong. The longer you stay of the throttle and build up gas in the pipes the worse it burps.

The bike runs fine but man not very impressive when riding with others and your burps like a pig when down shifting. I never had a problem like this on any other bike. It's very embarrising and needs to be addressed by my dealer.

Wacky
 

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Canuk said:
My Volusia did it as well, on the Volusia there was a pair valve. If it recall this right, this was a pollution control device that reburns the gas. You can bypass it on the Volusia easily. The popping also has absolutely no impact to performance.
I suspect the M109R has a similar device.
Exactly...... if you have modified either the intake or exhaust... you need to block off the line running from the airbox to a "T" device that has two exits (going to each cyl head). This is the PAIR system and is used to inject air into the exhaust for emissions.
 
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