What type of fuel in the old dunga?

aardvark · Post by **aardvark** » Wed Aug 26, 2009 8:39 pm

Just inherited a 1983 XT250T. Not sure what sort of fuel to put in it.... I'm going out on a limb and thinking it probably ran leaded when new, but what should I put in it now?

z900/zx9 · Post by **z900/zx9** » Wed Aug 26, 2009 9:33 pm

Different bike but simular age group, i run 98 in the z900 with a valve addative

Glen · Post by **Glen** » Thu Aug 27, 2009 7:45 am

Petrol I think

........sorry mate. Rightstart han an early 80's XT and we used to just run it on normal unleaded. It went fine.

aardvark · Post by **aardvark** » Thu Aug 27, 2009 9:56 am

Thanks Glen. I put some unleaded in last night and she fired into life after about 300 kicks..... Guess I"ll see how it goes.

Gosling1 · Post by **Gosling1** » Sat Aug 29, 2009 10:26 pm

Normal unleaded (91) should be fine in this bike mate - you could add some of that Valve lubricant stuff if you want ?

mike-s · Post by **mike-s** » Mon Aug 31, 2009 1:13 am

the gsx is an 81 model and takes plain ulp according to the manual.

aardvark · Post by **aardvark** » Mon Aug 31, 2009 8:06 am

Doesn't suprise me that while the rest of the world were using leaded fuel that the Japs were using unleaded.

Thanks guys.

mike-s · Post by **mike-s** » Mon Aug 31, 2009 8:53 am

If i recall plain unleaded was introduced here in 1985 or so?

Gosling1 · Post by **Gosling1** » Mon Aug 31, 2009 8:17 pm

aardvark wrote:Doesn't suprise me that while the rest of the world were using leaded fuel that the Japs were using unleaded.

Thanks guys.

the Japs were using this back in the early 70's mate - the first kwakka900 - the Z1 of 1972 - was released with hardened valves seats specifically for using unleaded fuel in the US market.....we were way behind with the introduction of 'normal' unleaded fuels well into the 80's......

Most jap bikes built during the 70's (especially models towards the later half) can cope with unleaded pump fuel .....that valve-seat protection/lubricant stuff does work, but its only needed every 4 or 5 tankfuls....

IsleofNinja · Post by **IsleofNinja** » Tue Sep 01, 2009 11:24 pm

Wot he said

Unless your running an old side banger Harley , Norton , indian , Beeza etc , pretty much all 4 stroke jappers ran stellite or similar seats and zorst valves . std ULP should be fine , PULP if she pings under power.

Old???? 83 is relatively cutting edge compared to some of the bikes I've had !!

Slow and wobbly · Post by **Slow and wobbly** » Wed Sep 02, 2009 7:45 pm

Mix it with Silkolene Pro KR2 for that nostalgic waft - 100:1

That would be 10ml for every litre then.
Avoid using diesel though.

Gosling1 · Post by **Gosling1** » Wed Sep 02, 2009 8:18 pm

aaah yes the *nostalgic waft* I recall it well...

Castrol R30 - about 25:1 in the old YZ80, and the whole MX track thought we were using ......*gulp*

.....AVGAS !! It was the shizzle back in 1981 !!

IsleofNinja · Post by **IsleofNinja** » Wed Sep 02, 2009 9:08 pm

Now look what you've started here Wobbles!!!! ..... (think I still have an old can of R30 somewhere .... sure the 30 yr old 2smoke Victa needs a dose this weekend

)

Gosling1 · Post by **Gosling1** » Wed Sep 02, 2009 9:13 pm

bung in some R30, mixed with *real* Avgas......and mate, your whippersnipper will zing through weeds 6' tall !!!

I tried that a few years ago with a bit of left-over Avgas and some Silkolene Pro2 2-stroke oil .....

fuck me dead the w/snipper revved its tits off !!!!

laidback · Post by **laidback** » Wed Sep 02, 2009 9:42 pm

Gosling1 wrote: bung in some R30, mixed with *real* Avgas......and mate, your whippersnipper will zing through weeds 6' tall !!!

I tried that a few years ago with a bit of left-over Avgas and some Silkolene Pro2 2-stroke oil ..... fuck me dead the w/snipper revved its tits off !!!!

Used to use leftover kart fuel in the lawnmower...almost made it enjoyable...

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What type of fuel in the old dunga?

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