Fuel

[Merlin]

deleted

[Steve Minor]

Hey Tom...(DKWRacer) In an earlier post you said "...I tend to shy away from the following mixture: 101 unleaded mixed 50/50 with 91 pump 40:1 Maxima 927...."

Is there something about Maxima 927 that I should know? Its one of the few oils I have to choose from at my local bike shop. No one around me carries Golden Spectro...

Steve

[Frenfroe]

Maxima 927 is a semi-synthetic blend of castor, synthetic, and possibly normal oils with additives that keep everything from seperating. It doesn't cause ring sticking as normal(100%) castor may but smells like the real thing. Sweet!  The K2 that I mentioned is Maxima's best 100% synthetic.

50:1 with 927 may be too thin a mixture for longest engine life, it is a blend. Castor is usually mixed at heavier ratios than normal oils anyway.

I don't hesitate to use K2 at 50:1 in any air-cooled bike......if jetting is correct and timing isn't too far advanced. In modern water-cooled trials bikes we usually mix a 100% synthetic oil at 80:1, some use 100:1. Typically our bikes run over 5 years putting a lot of hours on them practicing, in competition, and ripping from section to section, before they need rings or bearings. That says a lot for modern oils at light mix ratios.

Looking at the posts after my 1st, I seem to have been declared an idiot. My statement was that min. octane requirement in my Penton manual was 95 for the 175. You can't buy 95 where I live. We tend to jet our bikes, in the sake of more power, a little leaner than factory settings. We also may advance the timing a smidgen to get more power. More power=more heat add too low octane and we get detonation, shortened engine (rod, bearings and possibly piston) life, possibly a heat sezure "meltdown".

My GasGas 280 pings like crazy on 93 pump gas, GasGas recommends 95 octane. I could never retard the timing enough and rejet to get pump 93 to not ping. It runs fine at 95+ octane.

The cheapest 95 I have been able to create is the 100 LL and 93 mix. 100LL has little lead compared to leaded race fuels. I don't get any lead fouling on my plugs with it like I got with VP110, VP c4 (112), and other leaded race fuel blends.

Each to his own. I love America!

Frank

[Steve Minor]

Frank......In your opinion....do you see anything wrong with mixing Maxima 927 @40:1 with the high octane pump gas for my 77 400 GS6?

Thanks for the input

Steve

[Frenfroe]

Steve, I realize I stuck 50:1 in where I meant 40:1 on the 927.

IMO,[:0] I know it's not much difference between 32, 40, and 50:1 but I'd err towards 32:1 (4 oz/gallon) with the 927 if I were racing it. Oil costs less than motor rebuilds! I have no problem with the oil itself.

I'm pretty sure straight castor usually gets mixed at 24-32:1, I run synthetics at 50:1, therefore with a blend I'd lean towards the heavier mix.

I have heard, don't know how right they were, that the "927" stood for 9 parts synthetic to(2) 7 parts castor or vice-versa.

Frank

[Merlin]

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[Dennis Jones]

I run Golden Spectro at 50-1 with 93 octane pump gas in all my bikes, lawn mower, weedeater, chainsaw, and leaf blower. I'm not an expert rider or a chemist but with no top end failures in 25 years of using it I think I'm sold on it.

Dennis Jones

[Merlin]

.......no problem,why try to enlighten those that wish not to be??......

[Mick Milakovic]

As I said earlier in this thread, I've been using Specto synthetic in my bikes the last 3 years with good success.  Is Specto another brand of Golden Spectro?

[Lew Mayer]

Rich,
this is only my preference. I use 50/50 CAM 2 purple and high-test pump gas.

Lew Mayer

[Dennis D]

105 octane leaded from the speed shop and golden spectro 50:1 in both my 72 Piners Dennis D

[firstturn]

One word of caution: Heat  If you are running anything over 100 octaine, have a close bore and you are a fast rider you could have problems.  Please I do not want to debate this, but it is my thoughts and believe me I have accesses to any level of fuels that are made.  Just my take.

Ron Carbaugh

[tmc3c]

I am running 105 with maxim super m 40/1 with no problems. I wish I could find cam 2 fuel here.I used it in my 430 Husky in Charleston and I cut it with 93 unleaded.It would FLYYYY

Thomas Carmichael

[Mick Milakovic]

With all due respect to the riding abilities of everyone in this group (specially guys like "Smokin" Tom Benolkin):  Does octane really mean that much?  I know I'm not even close to the potential of my bikes running straight gas.  

Just for the record, I use Spectro synthetic mixed 50:1 and premium pump gas from the same Shell station every time.  I've never had a problem, my plugs run clean and I'm pretty sure my jetting will remain the same with the same gas.

[rich allison]

I wasn't as concerned about the octane as I was about the leaded unleaded issue. If unleaded works just as good as the leaded racing fuel I will run the pump gas mainly because it is a lot cheaper.

thanks

richard j allison