ICECOLD Posted February 19, 2013 Report Share Posted February 19, 2013 In my 2 stroke RM125 I like running leaded gas with a higher octane rating. A lot of people claim that it helps with the longevity of the rings and valves, helps with carbon deposit ect. In my 4 strokes though I run 93 or sometimes will put 100 unleaded if I can get it at a good price. Anyone run leaded in their 4 strokes and do you think it helps or hurts a 4 stroke engine? I know with the newer fuel injected bikes it's not good to run it in all the time. Just want to hear some opinions. Thanks. Quote Link to comment Share on other sites More sharing options...
3.504 Posted February 19, 2013 Report Share Posted February 19, 2013 ICECOLD said: In my 2 stroke RM125 I like running leaded gas with a higher octane rating. A lot of people claim that it helps with the longevity of the rings and valves, helps with carbon deposit ect. In my 4 strokes though I run 93 or sometimes will put 100 unleaded if I can get it at a good price. Anyone run leaded in their 4 strokes and do you think it helps or hurts a 4 stroke engine? I know with the newer fuel injected bikes it's not good to run it in all the time. Just want to hear some opinions. Thanks.leaded gas and oxygen sensors dont mix. as far as fuel injection is concerned: leaded is fine as long as theres no o2 sensors present.the only benefit to a leaded fuel would be the higher octane rating (unless that particular fuel is oxygenated and has other additives, but thats apples to oranges). the lead deposits on valves and rings.is a myth. lead was a cheap octane boost that was patented by the dupont company. when the patent ran out and the government cracked down, alternatives were found.that being said, even if there was a lead deposit benefit on valves, wouldnt help your 2stroke much... theyre valveless. youre benefit is higher octane, which isnt neccessarily a performance enhancer, but gives you the ability to build a hotter engine (ie: more compression)I run 93 + klotz super techniplate in my 2t's and strait 93 in my 4t'swith a 2 stroke, its best to worry about the type of oil an a the mixture. I run mine oil rich at 32:1. its less power but more longevity. you honestly probably couldnt feel the power difference and as long as youre jetted properly, you wont foul plugs. Quote Link to comment Share on other sites More sharing options...
bowdog Posted February 19, 2013 Report Share Posted February 19, 2013 my CR125 I ran a mix of 110 and 93 mixed together. I run 100 Octane in my Yamaha 450 quad but thinking about sending that one back to the race shop in the next couple of weeks for some rejetting. Quote Link to comment Share on other sites More sharing options...
ICECOLD Posted February 19, 2013 Author Report Share Posted February 19, 2013 I run my RM125 at 32:1. I put 2 oz in 2 gal and normaly it will last me a day of riding. 2 gal of leaded is not way too exencive so I dont mind it too much. Quote Link to comment Share on other sites More sharing options...
3.504 Posted February 19, 2013 Report Share Posted February 19, 2013 ICECOLD said: I run my RM125 at 32:1. I put 2 oz in 2 gal and normaly it will last me a day of riding. 2 gal of leaded is not way too exencive so I dont mind it too much.32:1 is 4oz of oil to 1 gal of gas. Quote Link to comment Share on other sites More sharing options...
ICECOLD Posted February 19, 2013 Author Report Share Posted February 19, 2013 (edited) Sorry... 8oz in 2gal (I'm from Europe, we run 1 in 1... 1oz in 1L on the very safe side LOL)... Gawd dang. Too early in the morning. I like running it a little rich on oil. Keep a spare plug just in case. Edited February 19, 2013 by ICECOLD Quote Link to comment Share on other sites More sharing options...
3.504 Posted February 19, 2013 Report Share Posted February 19, 2013 its cool, figured it was a typo, lol! Ive had success with my combination running klotz with pump 93 in my two strokes. I had a 02 rm125 i used for harescrambles that had 150 hrs on the top end. im currently building a cr250 gncc bike that I would expect similar to better results. (big bores dont carry the rpm of small bikes, tend to get more motor life). Quote Link to comment Share on other sites More sharing options...
gsxr1000bill Posted February 19, 2013 Report Share Posted February 19, 2013 ^^^I run the same klotz mixed at 50:1 in my 300. Quote Link to comment Share on other sites More sharing options...
shadyone Posted February 19, 2013 Report Share Posted February 19, 2013 Sunoco 93 and 32:1 mix. 2 stroke 250. Quote Link to comment Share on other sites More sharing options...
M_Quick Posted February 21, 2013 Report Share Posted February 21, 2013 I have not see leaded fuel for some time, what is this gossip? I always run 93 octane unleaded in my 4 stroke. Quote Link to comment Share on other sites More sharing options...
3.504 Posted February 21, 2013 Report Share Posted February 21, 2013 M_Quick said: I have not see leaded fuel for some time, what is this gossip? I always run 93 octane unleaded in my 4 stroke.www.vpracingfuels.comcheck out u4.4 Quote Link to comment Share on other sites More sharing options...
twowheelsnake Posted February 21, 2013 Report Share Posted February 21, 2013 93 in the Cannondale, or it doesn't run...period. Quote Link to comment Share on other sites More sharing options...
max power Posted February 21, 2013 Report Share Posted February 21, 2013 87 if I can't find 86. 1 Quote Link to comment Share on other sites More sharing options...
3.504 Posted February 21, 2013 Report Share Posted February 21, 2013 twowheelsnake said: 93 in the Cannondale, or it doesn't run...period.holy cow! you actually have one? must be one of the 10 made! actually didnt those become atk's newer product line? Quote Link to comment Share on other sites More sharing options...
TSB67 Posted February 21, 2013 Report Share Posted February 21, 2013 Similar to you I run 110 leaded in my two-strokes and 93 pump in my four strokes. The race gas for neither the octane or lead, just for jetting consistency and lack of deposits. The 110 leaded won't hurt anything without an O2 sensor or cat, but would probably just be a waste of money in the 4T. Might be in the 2T too, but since my 125 will do a lap and a half on what's in the float bowl, the cost is negligible.Race gas was also pretty much required when I raced karts and any alcohol content would fail the fuel testing. As has been discussed on here before you pretty much can't get pump without alcohol in it these days. Quote Link to comment Share on other sites More sharing options...
twowheelsnake Posted February 21, 2013 Report Share Posted February 21, 2013 3.504 said: holy cow! you actually have one? must be one of the 10 made! actually didnt those become atk's newer product line?Yup! It's a Stars and Stripes special edition. It's a 440 but it gives my buddies 700 raptor a run for its money. ATK took over in 2003 so I got one of the last actual cannondales Quote Link to comment Share on other sites More sharing options...
M_Quick Posted February 21, 2013 Report Share Posted February 21, 2013 max power said: 87 if I can't find 86.lol, I'd like to covert to e85! Quote Link to comment Share on other sites More sharing options...
bowdog Posted February 21, 2013 Report Share Posted February 21, 2013 max power said: 87 if I can't find 86.TRUE STORY!! even in his FZ1. Quote Link to comment Share on other sites More sharing options...
ICECOLD Posted February 21, 2013 Author Report Share Posted February 21, 2013 I live in New Albany, and there is that Sunoco off old 161 that has Supreme 112 Blue dye and thats what I have been buying. It's cheaper than the 110 at the Valero of Hamilton Rd and its a lot closer for me. I used to get it at $7.99/gal. Quote Link to comment Share on other sites More sharing options...
max power Posted February 21, 2013 Report Share Posted February 21, 2013 bowdog said: TRUE STORY!! even in his FZ1. If it doesn't ping, it's not necessary. You bubby's and your fancy shmancy gas. Quote Link to comment Share on other sites More sharing options...
3.504 Posted February 21, 2013 Report Share Posted February 21, 2013 max power said: If it doesn't ping, it's not necessary. You bubby's and your fancy shmancy gas. this is a true statement.you should actually run the lowest rating possible.running a higher octane where its not required is not only a waste, but can actually hurt performance.remember, octane rating essentially is gasolines resistance to ignite. the higher rated, the more resistant. the reason some claim smoother running and other such claims is usually due to the better additive package in the "plus" and "premium" blends. however, I wouldnt recommend running lower octane rated fuel than what your manufacturer recomends. Quote Link to comment Share on other sites More sharing options...
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