This topic contains 13 replies, has 0 voices, and was last updated by Trent 15 years, 3 months ago.
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December 26, 2009 at 9:29 am #97795
I’m probably going to have some more questions soon so I won’t make the title specific.
First question for this thread though, how long does mixed fuel stay good for. Is 1 month old mix too old? My bike has half a tank of fuel that’s 4-6weeks old so should I top it up with fresh fuel or dump it and run a full tank of fresh stuff?
In case it wasn’t clear earlier this is an indication of my level of 2 stroke knowledge :p
December 26, 2009 at 9:34 am #166283If you were racing I would change it but for your ride tomorrow it will be fine mate
TB
December 26, 2009 at 9:52 am #166285Great thanks for the tip. That means I can fill the jerry tomorrow and add 400ml of 2t oil and then just top the bike up otherwise I’d have to work out where I could dump this stuff.
Bloody festivities getting in the way of my bike prep time :p
December 26, 2009 at 11:04 am #166287My tip is put the old fuel in the bike, mix up a new batch in the jerry can then add that to your bike until it is full. This way you will get rid of all of your old fuel in one go and will have a minimum amount of fresh fuel getting stale. Try not to have to much premixed fuel laying around the garage.
Ollie
December 27, 2009 at 1:31 am #166293Mate it depends on the brand of oil, some oils will sediment out and need to be shaken back up and they are good to go, others will start to strip the chain of oils down and have a shelf life, others will last indefinitely , the biggest thing is to know your brand of oil and its specific requirements, as a general rule synthetics are not as stable as minerals, stick with a good brand and it will all be good, I have used for trail riding Castrol TTS with no dramas for years as well as Motul 800 on all our race bikes for years with no dramas as well, on of the most pivotal things is to get the jetting right(suited to your fuel/oil ratio) and you wont have issues, good luck
December 27, 2009 at 4:26 am #166295just to enforce what Dave has said stick to a good brand of oil and at the same ratio every time if possible. if you use a castor based oil this should be fresh each time you use it
it also doesnt like to be mixed with other oils
Ollie
December 27, 2009 at 6:49 am #166298It had belray in it and I mixed motorex in it today and it ran great.
thanks for that guysI dinged the chamber pretty good today but it doesn’t seem to have lost power.
Murph will post pics in the ride report.another tip for 2 strokers is to make sure you dont stall the bike when its warming up – I did and it fouled the plug and we couldn’t start it and had to put a fresh plug in.
December 27, 2009 at 7:03 am #166314Austblue wrote:
Quote:I dinged the chamber pretty good today but it doesn’t seem to have lost power.
Murph will post pics in the ride report.another tip for 2 strokers is to make sure you dont stall the bike when its warming up – I did and it fouled the plug and we couldn’t start it and had to put a fresh plug in.
Good things those two strokes :laugh: I nearly mentioned in this thread last night make sure you have at least one new plug
Dave warned us when we bought the 85 not to chop the throttle when cold
TB
December 27, 2009 at 7:40 am #166315Austblue wrote:
Quote:It had belray in it and I mixed motorex in it today and it ran great.
thanks for that guysI dinged the chamber pretty good today but it doesn’t seem to have lost power.
Murph will post pics in the ride report.another tip for 2 strokers is to make sure you dont stall the bike when its warming up – I did and it fouled the plug and we couldn’t start it and had to put a fresh plug in.
Get the jetting right and this will never happen again, I am still running the same plugs in 2 KTM 65’s and 2 KTM 85’s that have been there for years and this never happens, I would dive into the pilot jet and try leaning it off a tad
December 27, 2009 at 2:47 pm #166319there’s that TM jetting thing right there, i tend to disagree with my learned comrades on this point, all of my bikes since the late eighties once the jetting is sorted for the season have never fou;ed a plug, and while the warm-up is a personal thing I tend to not leave thechoke on past several seconds and then just a fast idle until I can feel warmth in the radiators, then all set to go.
Caveat, about three years ago the 300 fouled a plug on a really humd warm winters day after 40 mintues in goat trail s/T, never did it again as the weather was the anomaly, even the wr450s and CRF450s I was riding with were running rough that day.the TM has crankcase induction like some of the bikes of yore in my experience they are a bit more touchy on selection of idle jet/needle combo due to the increase vacuum signal.
BC
December 27, 2009 at 9:40 pm #166358Mr Blue wrote:
Quote:there’s that TM jetting thing right there, i tend to disagree with my learned comrades on this point, all of my bikes since the late eighties once the jetting is sorted for the season have never fou;ed a plug, and while the warm-up is a personal thing I tend to not leave thechoke on past several seconds and then just a fast idle until I can feel warmth in the radiators, then all set to go.
Caveat, about three years ago the 300 fouled a plug on a really humd warm winters day after 40 mintues in goat trail s/T, never did it again as the weather was the anomaly, even the wr450s and CRF450s I was riding with were running rough that day.the TM has crankcase induction like some of the bikes of yore in my experience they are a bit more touchy on selection of idle jet/needle combo due to the increase vacuum signal.
BC
Yes what he says is the go
Get it sorted and you wont have the issue again
Right again Mr Blue
cant wait to sit and chew the fat with you my friend…..one day…..one day
Hey Bruce are you doing the 5 way series round when it comes to your local track this year, I will be there and would love to catch up with yaRat
December 28, 2009 at 4:01 am #166282Bike ran great today without a worry. I used the choke to kick it over then turned it off straight away and then kept a bit of revs in it till it warmed up. Absolutely loved it today and although I was a bit tired to use the power all day I was getting cocky with it a bit and lofting the front which was an absolute effort with the 250. Very confidence inspiring bike in standard trim. I’ll do a quick report on today once I’ve uploaded the videos and then during the week I’ll do a bit of a review on the bike.
December 28, 2009 at 11:57 am #166361Ktmrat wrote:
Quote:Mr Blue wrote:Quote:there’s that TM jetting thing right there, i tend to disagree with my learned comrades on this point, all of my bikes since the late eighties once the jetting is sorted for the season have never fou;ed a plug, and while the warm-up is a personal thing I tend to not leave thechoke on past several seconds and then just a fast idle until I can feel warmth in the radiators, then all set to go.
Caveat, about three years ago the 300 fouled a plug on a really humd warm winters day after 40 mintues in goat trail s/T, never did it again as the weather was the anomaly, even the wr450s and CRF450s I was riding with were running rough that day.the TM has crankcase induction like some of the bikes of yore in my experience they are a bit more touchy on selection of idle jet/needle combo due to the increase vacuum signal.
BC
Yes what he says is the go
Get it sorted and you wont have the issue again
Right again Mr Blue
cant wait to sit and chew the fat with you my friend…..one day…..one day
Hey Bruce are you doing the 5 way series round when it comes to your local track this year, I will be there and would love to catch up with yaRat
Am planning to do a few local meetings this season Mr Rat, certainly after this heat has settled. 1st priority is getting the young fellas’ licence sorted, actually the STB (Border boys) were planning to do some SE QLD and NE NSW meetings as a team, so even if I’m not competing I’ll be there, just give me a yell a week in front, gunna pick yer brains on conventional forks in junior racing…….
AB aren’t you glad you got a smoker, happy days are here for you now, just ride and occassionally spin a spanner and apply some locite and Bobs yer uncles best mate
Bruce
December 28, 2009 at 10:19 pm #166425Speaking of loctite – the rear brake step plate was loose and we didn’t have an allen key small enough! Lucky they used nyloc (sp?) nuts so it didn’t come off and I’ve since tightened. Good way for me to learn that 2 smokes need a bit of tightening occasionally :p
I’m definitely sure this was the right bike for me, it’s powerful but still light and very tractable in all situations. I’ve tried the different map settings and I can’t feel the difference. I also prefer the torque controller on 1 which is the stock setting because the power is more linear and therefore predictable and useable.
I just need to get a lot of trail time to build my own skills
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