Long-term damage from not re-jetting?
#1
08-31-2007, 06:39 AM
Long-term damage from not re-jetting?
So I've gotten bits and peices of this answer throughout this forum, but thought I'd try to get a better concensus:
Are there any problems that one would experience from putting on an aftermarket slip-on pipe (TBR) and not re-jetting? I also just removed the snorkel, left the lid, and it seems to have minimal effect. Might put the snorkel back on.
I know that the bike is now getting a different mixture of air/fuel but I'm ok with the performance. I'm not seeking power gain, just trying to cut down on heat. I relize now that I probably could have down this for a few dollars just by removing the smog. Live and learn. I love the bike and am more than happy with it's power, I sold a two-stroke 250 because it was out of my league, I love how smooth this bike is and it handles all the hills and mud and rivers I can put it to.
Long-story short, I don't want to HURT the engine by having an improper mix. Is this possible, or nothing to worry about?
Are there any problems that one would experience from putting on an aftermarket slip-on pipe (TBR) and not re-jetting? I also just removed the snorkel, left the lid, and it seems to have minimal effect. Might put the snorkel back on.
I know that the bike is now getting a different mixture of air/fuel but I'm ok with the performance. I'm not seeking power gain, just trying to cut down on heat. I relize now that I probably could have down this for a few dollars just by removing the smog. Live and learn. I love the bike and am more than happy with it's power, I sold a two-stroke 250 because it was out of my league, I love how smooth this bike is and it handles all the hills and mud and rivers I can put it to.
Long-story short, I don't want to HURT the engine by having an improper mix. Is this possible, or nothing to worry about?
#2
08-31-2007, 07:09 AM
RE: Long-term damage from not re-jetting?
Removing the snorkle lets more air in making it run lean. Lean = more heat, more heat = damaged engine in time.
Most aftermarket mufflers flow more air which will make it run leaner. Lean = more heat, more heat = damaged engine in time.
I suggest you at least put the snorkel back in until you jet it right
Most aftermarket mufflers flow more air which will make it run leaner. Lean = more heat, more heat = damaged engine in time.
I suggest you at least put the snorkel back in until you jet it right
#3
08-31-2007, 09:51 AM
Join Date: May 2006
Location: Pittsburgh, PA
Posts: 12,584
RE: Long-term damage from not re-jetting?
ORIGINAL: MaverickAus
Removing the snorkle lets more air in making it run lean. Lean = more heat, more heat = damaged engine in time.
Most aftermarket mufflers flow more air which will make it run leaner. Lean = more heat, more heat = damaged engine in time.
I suggest you at least put the snorkel back in until you jet it right
Removing the snorkle lets more air in making it run lean. Lean = more heat, more heat = damaged engine in time.
Most aftermarket mufflers flow more air which will make it run leaner. Lean = more heat, more heat = damaged engine in time.
I suggest you at least put the snorkel back in until you jet it right
#4
08-31-2007, 12:25 PM
Join Date: Oct 2006
Location: Kersey, PA
Posts: 463
RE: Long-term damage from not re-jetting?
If you're too lean, you will eventually melt a hole in the piston. The excessive heat melts the aluminum of the piston crown - especially in the thinner areas around the valve reliefs. You'll be able to verify this by pulling the spark plug - little silver specs on the plug are a sure indication of being excessively lean.
With that being said, I don't think the mods you've done so far will get you to that point, but why chance it? To take full advantage of letting more air in and out of the engine, you have to add more fuel also. That's why your changes so far have not made much of a difference.A richer engine also runs cooler, so a rejet will achieve all of your goals at once.
With that being said, I don't think the mods you've done so far will get you to that point, but why chance it? To take full advantage of letting more air in and out of the engine, you have to add more fuel also. That's why your changes so far have not made much of a difference.A richer engine also runs cooler, so a rejet will achieve all of your goals at once.
#5
08-31-2007, 12:33 PM
RE: Long-term damage from not re-jetting?
ORIGINAL: HawaiiRider
So I've gotten bits and peices of this answer throughout this forum, but thought I'd try to get a better concensus:
Are there any problems that one would experience from putting on an aftermarket slip-on pipe (TBR) and not re-jetting? I also just removed the snorkel, left the lid, and it seems to have minimal effect. Might put the snorkel back on.
I know that the bike is now getting a different mixture of air/fuel but I'm ok with the performance. I'm not seeking power gain, just trying to cut down on heat. I relize now that I probably could have down this for a few dollars just by removing the smog. Live and learn. I love the bike and am more than happy with it's power, I sold a two-stroke 250 because it was out of my league, I love how smooth this bike is and it handles all the hills and mud and rivers I can put it to.
Long-story short, I don't want to HURT the engine by having an improper mix. Is this possible, or nothing to worry about?
So I've gotten bits and peices of this answer throughout this forum, but thought I'd try to get a better concensus:
Are there any problems that one would experience from putting on an aftermarket slip-on pipe (TBR) and not re-jetting? I also just removed the snorkel, left the lid, and it seems to have minimal effect. Might put the snorkel back on.
I know that the bike is now getting a different mixture of air/fuel but I'm ok with the performance. I'm not seeking power gain, just trying to cut down on heat. I relize now that I probably could have down this for a few dollars just by removing the smog. Live and learn. I love the bike and am more than happy with it's power, I sold a two-stroke 250 because it was out of my league, I love how smooth this bike is and it handles all the hills and mud and rivers I can put it to.
Long-story short, I don't want to HURT the engine by having an improper mix. Is this possible, or nothing to worry about?
#6
08-31-2007, 01:15 PM
Join Date: May 2006
Location: Pittsburgh, PA
Posts: 12,584
RE: Long-term damage from not re-jetting?
ORIGINAL: warsanrotts
I called Two Brothers to ask what they recomended for re-jetting and he said on this bike, stock everything else, should run great without re-jetting. I'm leaving mine as is for a while.
ORIGINAL: HawaiiRider
So I've gotten bits and peices of this answer throughout this forum, but thought I'd try to get a better concensus:
Are there any problems that one would experience from putting on an aftermarket slip-on pipe (TBR) and not re-jetting? I also just removed the snorkel, left the lid, and it seems to have minimal effect. Might put the snorkel back on.
I know that the bike is now getting a different mixture of air/fuel but I'm ok with the performance. I'm not seeking power gain, just trying to cut down on heat. I relize now that I probably could have down this for a few dollars just by removing the smog. Live and learn. I love the bike and am more than happy with it's power, I sold a two-stroke 250 because it was out of my league, I love how smooth this bike is and it handles all the hills and mud and rivers I can put it to.
Long-story short, I don't want to HURT the engine by having an improper mix. Is this possible, or nothing to worry about?
So I've gotten bits and peices of this answer throughout this forum, but thought I'd try to get a better concensus:
Are there any problems that one would experience from putting on an aftermarket slip-on pipe (TBR) and not re-jetting? I also just removed the snorkel, left the lid, and it seems to have minimal effect. Might put the snorkel back on.
I know that the bike is now getting a different mixture of air/fuel but I'm ok with the performance. I'm not seeking power gain, just trying to cut down on heat. I relize now that I probably could have down this for a few dollars just by removing the smog. Live and learn. I love the bike and am more than happy with it's power, I sold a two-stroke 250 because it was out of my league, I love how smooth this bike is and it handles all the hills and mud and rivers I can put it to.
Long-story short, I don't want to HURT the engine by having an improper mix. Is this possible, or nothing to worry about?
Im not saying its gonna happen, but if it were me id listen to ppl on the forum before someone who deals with all kinds of makes and models.... unless they have dyno tested it and used an exhaust sniffer...
#9
08-31-2007, 03:18 PM
RE: Long-term damage from not re-jetting?
I was just quoting what the guy from Two Brothers said. Thought is was kind of interesting on his answer. I do plan on re-jetting very soon and also adding on a different filter. I aggree that if you are letting more out, more needs to go in. As we are on this topic, what jets would you recomend? The only thing I have done so far is the exhaust.
Thanks,
Thanks,
#10
09-01-2007, 03:52 AM
RE: Long-term damage from not re-jetting?
I was happy with the 125 main, 2.5 turns on screw, NTIC needle on second clip, slip on, KDX snorkel & then better with no snorkel but having lid on. I am happier yet with my Dynojet kit but I went to 300cc at the same time so my settings wont be 100% for you altho others know how to set them up for 250cc.
You are not getting the most from your pipe without rejetting.
1100 feet normall with rides of 5000-7000 on occation.
You are not getting the most from your pipe without rejetting.
1100 feet normall with rides of 5000-7000 on occation.