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Super Tenere Misfires

Johannes Maritz

Johannes Maritz

New Member
Joined
Nov 21, 2018
Messages
7
Location
Cape Town
Hi
I’ve got a 2012 xt1200 with 70k kilometres with an unexplainable misfire. Serviced the bike at agents and did a 1500km trip. After about 1000km it started to misfire, getting progressively worse. Replaced the plugs (which looked new) and the misfire went away. Also checked coils, all were good. Same happened on the return trip. Misfire started after about 1000km. New plugs and no misfire. Plugs are OEM CPR8EB-9.
Most of my previous trips were shorter approx 400/500 km. No previous issues, bike runs like a champ.
Bought the bike used with aftermarket exhaust. Don’t know if it can be an incorrect mapping causing it to run lean etc?
Thanks
 
swakop_toe

swakop_toe

Active Member
Joined
May 28, 2012
Messages
105
Location
Cape Town, South Africa
Hi Johannes.
Where are you based?
Regardless, my 2010 at about 45000km had similar issues and also did the whole spark plug swap (with Iridiums), even bought new coils.
Eventually was the teabag filter in the fuel pump that was clogged.
Had it replaced by an indy mech here in Cape Town for very little money and a much responsive bike.

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Johannes Maritz

Johannes Maritz

New Member
Joined
Nov 21, 2018
Messages
7
Location
Cape Town
Tx Swakop, much appreciated, I’ll have it checked out. Did your issue also appear after riding the bike for some time e.g. a long days ride. I’m just confused as to why the bike runs ok after changing plugs. How would the filter affect that? More responsive bike sounds good, how does the filter affect the performance?
Tx
 
swakop_toe

swakop_toe

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Joined
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Messages
105
Location
Cape Town, South Africa
Many possibilities, I suppose.
You have to tip the tank up and back to gain access to the sparkplugs. Perhaps it dislodged some debris and the fuelpump sucked it into the filter?

You said the coils tested fine.
So spark is there.
Air not an issue?
Other than than that, the fuel supply.
Else, have the carbs balanced.

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lund

lund

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Jul 8, 2019
Messages
811
Location
Okanagan Valley, Canada.
Sooo, when they changed the plugs, do you know if the plug gap was adjusted.
2 sets of plugs in 1000kms then a misfire, points to improper sparkplug gap.
Plug set too wide will eventually misfire, sooner then later. ALWAYS check sparkplug gap and set accordingly before installation.
 
Johannes Maritz

Johannes Maritz

New Member
Joined
Nov 21, 2018
Messages
7
Location
Cape Town
swakop_toe said:
Many possibilities, I suppose.
You have to tip the tank up and back to gain access to the sparkplugs. Perhaps it dislodged some debris and the fuelpump sucked it into the filter?

You said the coils tested fine.
So spark is there.
Air not an issue?
Other than than that, the fuel supply.
Else, have the carbs balanced.

Sent from my Nokia 5.4 using Tapatalk
Click to expand...
Bike has been standing, so cleaning tank & filter seems a good place to start.
 
swakop_toe

swakop_toe

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Messages
105
Location
Cape Town, South Africa
MIKE R

MIKE R

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Feb 5, 2012
Messages
722
Location
Lancashire, UK
I also had a misfire at about 70k when on a trip to Norway

As suggested above it turned out to be a clogged petrol filter. It's not mentioned in the service schedule so if your bike is dealer serviced there's a strong chance it's never been cleaned

Mike
 
Johannes Maritz

Johannes Maritz

New Member
Joined
Nov 21, 2018
Messages
7
Location
Cape Town
Misfire update

Got a new pump & teabag kit from Trac Mac in Bellville. Bike is running better than ever. Thanks for the advice, much appreciated.
I cannot fathom why the fuel filter is not checked in the service schedule. I stupidly assumed that something so basic would be inspected and replaced during a major service (like my truck and my car). But now I know to check it myself.
Tx
 
swakop_toe

swakop_toe

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Joined
May 28, 2012
Messages
105
Location
Cape Town, South Africa
Johannes Maritz said:
Misfire update

Got a new pump & teabag kit from Trac Mac in Bellville. Bike is running better than ever. Thanks for the advice, much appreciated.
I cannot fathom why the fuel filter is not checked in the service schedule. I stupidly assumed that something so basic would be inspected and replaced during a major service (like my truck and my car). But now I know to check it myself.
Tx
Click to expand...
Well done.
Did you remove the duel pump and replace the teabag filter yourself?

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Johannes Maritz

Johannes Maritz

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Nov 21, 2018
Messages
7
Location
Cape Town
Removing the fuel pump and replacing the tea bag is straight forward. Getting the pump out of the tank takes some wiggling, eventually I managed to unclip the fuel gage sensor from the main assembly because I couldn’t get the complete assembly out. Once it is out, it’s a 5 minute job to replace the tea bag. Care must be taken not to damage the O-rings and to ensure everything seals tight when reassembled. If the pump loses pressure due to incorrect assembly the bike won’t start. Happened to me, I had to take everything apart and re-check my assembly, cause I was in a hurry and one of the O-rings didn’t seal properly. With the new filter the bike runs much better. I’m going to source a few bags and replace maybe every 20/30k.
 
swakop_toe

swakop_toe

Active Member
Joined
May 28, 2012
Messages
105
Location
Cape Town, South Africa
Johannes Maritz said:
Removing the fuel pump and replacing the tea bag is straight forward. Getting the pump out of the tank takes some wiggling, eventually I managed to unclip the fuel gage sensor from the main assembly because I couldn’t get the complete assembly out. Once it is out, it’s a 5 minute job to replace the tea bag. Care must be taken not to damage the O-rings and to ensure everything seals tight when reassembled. If the pump loses pressure due to incorrect assembly the bike won’t start. Happened to me, I had to take everything apart and re-check my assembly, cause I was in a hurry and one of the O-rings didn’t seal properly. With the new filter the bike runs much better. I’m going to source a few bags and replace maybe every 20/30k.
Click to expand...
Again, well done.
That pump removal is a bloody PITA.
I also have the teabag filter on scheduled replacement now.

Also, do yourself a favour. Inspect the inside of the petrol tank. Mine is showing signs of rust.
One contribution factor effecting the teabag filter negatively.
I dread having to have to get the inside of the tank lined/sealed. Apparently one has to waiver all responsibility of damage to the paint.


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C

Cycledude

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Joined
Jan 29, 2016
Messages
4,034
Location
Rib lake wi
Be careful not to allow dirt to fall into the tank and you will most likely never experience a fuel pump filter issue.
 
ErictheBiking

ErictheBiking

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Joined
Feb 28, 2020
Messages
58
Location
Australia
And install a Guglatech fuel filter into the tank for extra protection.
I add a cup of methylated spirits to the tank once a year to get rid of any water from condensation..
 
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