New Bike Hesitating / Sputtering

[GoldOxide_imp]

mine had same issue when i bought it very low millage and i changed the plugs and it ran great and still is today 4k miles later it would almost die when cracking the throttle at low speed

Try going back to regular unleaded and evaluate if the root cause has been cleaned out?

If not, then the real problem is just being masked.

 

[1973cb750]

mine had same issue when i bought it very low millage and i changed the plugs and it ran great and still is today 4k miles later it would almost die when cracking the throttle at low speed

Try going back to regular unleaded and evaluate if the root cause has been cleaned out?

If not, then the real problem is just being masked.

Try going back to regular unleaded and evaluate if the root cause has been cleaned out?

If not, then the real problem is just being masked. problem was it was started to move and shut off by the previous owner daily and a rich mixture from it being cold fouled the plugs I've only ran 100 percent gas never e10 also as I said I have not had the problem come back I'm a mechanic by trade I know my way around a engine

 

[GoldOxide_imp]

mine had same issue when i bought it very low millage and i changed the plugs and it ran great and still is today 4k miles later it would almost die when cracking the throttle at low speed

Try going back to regular unleaded and evaluate if the root cause has been cleaned out?

If not, then the real problem is just being masked.

Try going back to regular unleaded and evaluate if the root cause has been cleaned out?

If not, then the real problem is just being masked. problem was it was started to move and shut off by the previous owner daily and a rich mixture from it being cold fouled the plugs I've only ran 100 percent gas never e10 also as I said I have not had the problem come back I'm a mechanic by trade I know my way around a engine

Try going back to regular unleaded and evaluate if the root cause has been cleaned out?

If not, then the real problem is just being masked. problem was it was started to move and shut off by the previous owner daily and a rich mixture from it being cold fouled the plugs I've only ran 100 percent gas never e10 also as I said I have not had the problem come back I'm a mechanic by trade I know my way around a engine
For some reason I thought you also had the same issue as obleo's prior post. An incorrect plug heat range sounds like a reason assessment to me 1973cb750.

I also use the Techron fuel stabilizer along with seafoam. Both good products , and always use 91 octane ethanol free fuel. Never have had fueling issues in multiple small engines.

 

[Nachodaddy]

We seem to beat this problem senseless every few years. There was an endless discussion of this in "Hesitation? Not running smoothly?" People swore by fuel additives, using fuel without alcohol, using high-octane fuel, replacing the IACV, replacing spark plugs, replacing the coils, but I wonder if anyone has ever determined what causes it and how to fix it?
Refer to "Hesitation? Not running smoothly?" post #65 and go back from there.

 

[dave]

Yes seafoam is cleaner and fuel stabilizer. I get mine at autozone in gallon jugs, since I use it in 3 motorcycles, 2 mowers,a weed whacker, a leaf blower, a snow blower and a chain saw. Have had zero fueling issues since I started using seafoam for storage and for the first couple of tanks in the spring. Good stuff imo.

Hi Ferret, can Seafoam be used with diesels? Thanks.

 

[the Ferret]

I don't know Dave, it's a gas stabilizer????

Yesterday I needed to use my chainsaw to clear a few limbs. I dug it out and looked at the tag on it where I write when it was last run and got Seafoam in it. It said 11/18/20. UH oh. I guess I haven't used it in awhile lol. Now I'm kind of worried if it's going to start and run. Checked the gas in the unit and it still had some. Didn't have any in the 1 gallon jug in the shed. Oh well. Flip the lever, pull it through a few times easy, pull 2 times hard and it pops. Back off the choke pull it once and it fires right up and runs clean. Cut the branches I needed to cut and put it back away.

I'm a believer.

 

[GoldOxide_imp]

I don't know Dave, it's a gas stabilizer????

Yesterday I needed to use my chainsaw to clear a few limbs. I dug it out and looked at the tag on it where I write when it was last run and got Seafoam in it. It said 11/18/20. UH oh. I guess I haven't used it in awhile lol. Now I'm kind of worried if it's going to start and run. Checked the gas in the unit and it still had some. Didn't have any in the 1 gallon jug in the shed. Oh well. Flip the lever, pull it through a few times easy, pull 2 times hard and it pops. Back off the choke pull it once and it fires right up and runs clean. Cut the branches I needed to cut and put it back away.

I'm a believer.

Awesome, and good to know for small displacement motors.