What gas should I use?

[El Camexican]

Any of you guys seeing corrosion on the plated screws inside your carbs? I am and my gas supposedly doesn’t even have Ethanol content, but I do buy a few tanks at desert ejidos, so God only knows what quality it is. Run the 91 and run the carb dry if you plan to let it sit for more than a month would be my $0.02.

[3>4]

This explains why they put ethanol in gas. http://green.autoblog.com/2009/08/13...l-in-gasoline/

[slashfan7964]

Dad has run 91 in a stock 85 200X for years but only recently changed to 87 and you can hear it ping if you get heavy on it.

Stick with 91 IMO.

[86125m]

Well all I can say is that we run just plain chevrron gasoline and don't havde any problems. However we ride our bikes every day. So we use alot of gas.

[Liquid-Darkness]

Got my X and it was running 91. Stock engine but had a K&N and Cobra. My spark plug was sooty and black as heck. Not good for the rings for an engine to run such high octaine and not need it?? Just sayin.

[barnett468]

Got my X and it was running 91. Stock engine but had a K&N and Cobra. My spark plug was sooty and black as heck. Not good for the rings for an engine to run such high octaine and not need it?? Just sayin.

incresasing the octane will have no affect on your plug getting "sooty".

[barnett468]

Well all I can say is that we run just plain chevrron gasoline and don't havde any problems. However we ride our bikes every day. So we use alot of gas.

well does it have any ethanol?

what octane is it?

what compression is your bike, his is 9.6 if it is stock?

[barnett468]

Dad has run 91 in a stock 85 200X for years but only recently changed to 87 and you can hear it ping if you get heavy on it.

Stick with 91 IMO.

Hi Slash;



I suggest you run at least 89 then. here's the deal, in your case you are on the fringe/threshold of "audible" deto all the time and occasionally over it. Not all detonation is "audible". i guarantee you that there is detonation occurring in your bike that you can not hear.

Just because it is not "audible" [loud enough to hear], it does not mean that it will not harm your engine.

All detonation is bad, but there is a level that is "acceptable/accepted" in race engines because they need to run near the threshold anyway.



Hi Slash...I'm sorry but Heidi couldn't be here. She had a headache. Perhaps you would like one of my Pauli Girls?



Ulga...the St Pauli Girl AARP party hostess.


OMG...I'd hurl but I'm layin on my back.

[slashfan7964]

Hi Slash;



I suggest you run at least 89 then. here's the deal, in your case you are on the fringe/threshold of "audible" deto all the time and occasionally over it. Not all detonation is "audible". i guarantee you that there is detonation occurring in your bike that you can not hear.

Just because it is not "audible" [loud enough to hear], it does not mean that it will not harm your engine.

All detonation is bad, but there is a level that is "acceptable/accepted" in race engines because they need to run near the threshold anyway.



Hi Slash...I'm sorry but Heidi couldn't be here. She had a headache. Perhaps you would like one of my Pauli Girls?



Ulga...the St Pauli Girl AARP party hostess.


OMG...I'd hurl but I'm layin on my back.

I would but to get 89 is kind of out of our way. I'm not worried about it. His motor. He blows it up he rebuilds it. Not my problem.

Got my X and it was running 91. Stock engine but had a K&N and Cobra. My spark plug was sooty and black as heck. Not good for the rings for an engine to run such high octaine and not need it?? Just sayin.

Stock X has 8.5:1 compression. It's not meant to run on anything higher than 87 unless you increase the compression.

[Liquid-Darkness]

incresasing the octane will have no affect on your plug getting "sooty".

Well maybe sooty is not a good word to use, the plug did turn black, and as I replaced the fuel completely with 87 octaine from 91 and jetted a bit the plug started to clean its self and lean out, tan/grey a bit.

[Liquid-Darkness]

I would but to get 89 is kind of out of our way. I'm not worried about it. His motor. He blows it up he rebuilds it. Not my problem.






Stock X has 8.5:1 compression. It's not meant to run on anything higher than 87 unless you increase the compression.

Yeah thats what I thought, so running 87 octaine cleaned up my plug a bit and it started to tan. Running 91 made my plug all black.

[Liquid-Darkness]

Runniung higher octaine then is needed is no good for the rings right? WOnt the rings and cylinder glaze eventually from too much fuel??

[bigdaddyvw185]

Just throwing this out there.... from what i have been told this stuff is a big help. I recently started working at a motorcycle shop and my boss friggin swears by the stuff he runs it in everything from his diesel pickups to his lawn mowers. from what i understand it is supposed to significantly help with ethanol fuel related problems.
http://www.starbrite.com/item/star-t...ategory_id=586

I have yet to actually run it myself but have full intentions on giving it a shot one of these days.

[Jwmajic]

The problem we get around here is with the high humidity you have to keep your tank full or it sweats and cause the ethanol gas to phase separate. I get tired of cleaning my carbs all the time and started buying the ethanol free gas its only 20 cents more a gallon.

[barnett468]

Well maybe sooty is not a good word to use, the plug did turn black, and as I replaced the fuel completely with 87 octaine from 91 and jetted a bit the plug started to clean its self and lean out, tan/grey a bit.

hi liquid darkness;

of course it cleaned the plug because you jetted the bike, lol. your jetting was obviously the prob, not the gas.