ye ye and next you will say you put telcon powder on the as wellOriginally Posted by Kickaha
Forum whore
ye ye and next you will say you put telcon powder on the as well
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
“Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower
In the riders seat
Tyre talc, yes I did, stupid to fit any tube without it, there's a few others that have run tubes in them down here without any problemsye ye and next you will say you put telcon powder on the as well
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Forum whore
Good to hear someone has had a good run with tubes in slicks.
We haven’t had such a good run, we run 18 psi F & R and if the day is realy cold 16-17 psi. the cart track is also pretty demanding cornering wise.
Its a a tight circuit with low tyre pressures the norm here at Mt Welly, we change the tubes before the two hour each year and sometimes again before Taupo.
What pressures do you run?
In the riders seat
I haven't ever run less than 26, less flex with a higher pressure so less likely for the problems you are having to occur
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Forum whore
Yes 26 is about what the manufacturer recommends, but wouldn’t work for us, we would be on our backsides in no time.
We need the low pressure so the tyres flex and heat up and work properly on the short cart tracks.
But the extra tyre flexing eats into our tubes quite quickly.
Why Not???: MNZ975.
A Little bit off topic, but a while ago (maybe 18 months or so), i read an article on tube/tubeless (lack of a the correct name) systems for MX / enduro bikes (I'm still trying to find it).
summary of what it was:
a smaller inner tube (more like a mountain bike tube in size but a whole lot thinker) that sat and sealed the spokes nipples and rim base, with a second inlet that passed through into the cavity between the smaller tube and the tyre; when inflated (40-60psi i think) the tube sealed everything up. then you just put in the required air pressure as you would a tubeless tyre.
the main function of this system was (as far as I can recall):
1. to reduce the wear on the tube from the steel belts, by producing a air cavity between them.
2. if a tyre did get punctured it would hopefully only let the air out of the cavity and you might be able to get home on a slightly deflated tyre sitting on the inflated inner tube.. not ideal, but if your in the back of nowhere it might save your tyre...
anyway, I just wander if this kind of solution might be worth investigating, especially if your filled the air cavity with nitrogen to stabilise the temperature and expansion rates.
Another option is to put a cut inner tube around the actual inner tube thus increasing / supplying an extra layer to reduce wear on the actual inflated tube. I've done this before when my old mx tyres had / were a bit sharp on the inside. basically spot glued it together; but I'm sure others will say this is a stupid idea, but it seemed to work for a while so i could save up for new tyres...
No8 Wire Extraordinaire
Buy some decent tubes, ones that don't say Kings or Chen Sheung on the box. Don't use tubes that have sat out of the box in sunlight.
But yeah tubeless is much better.
Don't you look at my accountant.
He's the only one I've got.
In the riders seat
Made in Japan are noramlly good quality although if I can get them I like Michelin
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."
Forum whore
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From :- http://justkdx.dirtrider.net/printcarbtuning.html
No jet acts independently of the others but rather they work together to deliver gasoline to the engine.
They do however target specific throttle openings and have the most effect in that area. See below.
The air screw is most effective between idle through 1/8 throttle.
The pilot (slow) jet is most effective between 1/8 through 1/4 throttle.
The slide valve is most effective between 1/8 through 1/2 throttle
The jet needle is most effective between 1/4 through 3/4 throttle.
The main jet is most effective between 3/4 through wide-open throttle.
.................................................. .................................................. ........
Not talked about much, but as Team ESE found out, the height the needle jet stands up in the carb throat has a very big effect on mixture strength or atomization around the eighth to half throttle position, shorter is weaker and a too short a one accidentally fitted to one of the GPs caused no end of trouble with a major flat spot and the bike was really un rideable regardless of what other jetting changes were made.
Forum whore
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Pic 1.... http://www.psep.biz/store/mikuni_needle_jet.htm
Something worth knowing about Mikuni needle and main jets:- http://www.ozebook.com/compendium/t500_files/mikuni.pdf
Forum whore
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DON'T OPEN THAT THROTTLE WHEN USING THE CHOKE!
Air flowing into the starting carburetor makes fuel come out of the bowl to join the airflow, and this is caused by the high vacuum, or suction, because you are cranking the engine. The piston is moving up and down gasping for air, but it can't get very much, so vacuum is high.
What makes high vacuum behind the throttle slide, is the fact that you are cranking the engine with the THROTTLE SLIDE CLOSED. Leave the throttle completely closed until the engine starts. If you can't resist opening the throttle with a spastic reaction every time your kicking foot moves down, try putting your right thumb in your mouth.
If you insist on opening the throttle, the vacuum behind it disappears and the starting carb will not work. Most of the hard starting of Mikuni-equipped bikes is caused by this right-hand syndrome.
and other good advice from here:- http://dirtbike.off-road.com/dirtbik....jsp?id=265950
Forum whore
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From:- http://www.iwt.com.au/mikunicarb.htm
The slide valve affects carburetion between 1/8 thru 1/2 throttle. It especially affects it between 1/8 and 1/4 and has a lesser affect up to 1/2. The slides come in various sizes and the size is determined by how much is cutaway from the backside of it, fig 3. The larger the cutaway, the leaner the mixture (since more air is allowed through it) and the smaller the cutaway, the richer the mixture will be. Throttle valves have numbers on them that explains how much the cutaway is. If there is a 3 stamped into the slide, it has a 3.0mm cutaway, while a 1 will have a 1.0mm cutaway (which will be richer than a 3).
No8 Wire Extraordinaire
Kicking foot? Why are you kicking the poor bike? Just let the clutch out as you push it along.
You can tell that was written in the 70s (let me guess Super Hunky?) that sort of terminology would have the lawyers running for cover these days.
Don't you look at my accountant.
He's the only one I've got.
Forum whore
Sunday at Mt Welly. points day, It was a totally fun day with lots of laughs for Team ESE.
Chambers got to wave the Green and Checkered Flags and I managed a stint or two at the flag marshals stations. Very few incidents and none in my quadrant, so didn’t have to flap the yellow flag at all.
Conditions were near perfect and the racing was very fast, with NedKelly trying out his GPS lap and data logger, recording PB times and thoroughly enjoying himself.
Henk commented how much faster everyone seemed to be. I guess it’s the ready availability of good second hand slicks and the numbers of FXR’s on the track. There is no doubt about it; the FXR is the business for Bucket racing at Mt Welly and the bike to beat.
Buckets4me borrowed Ned’s bike for the “B” grade and got a flying start taking the lead from the second row going around the sweeper and still holding first position after a couple of laps..........we were all going wild and cheering.......
Then as the race of his life was unfolding, inexplicably in front of the pits and everyone watching he swerved off the track, pulling a sharp right at mach 9 into the infield. His ride had developed a mind of its own.
When he came to a stop we could see the back wheel was flopping all about.Someone hadn't done up the swing arm bolt properly and it was half out giving Team ESE its first real DNF. But when Buckets had finished his little rain dance
he managed to see the funny side of it all.........
Due to a last minute race order change for F5, Buckets had to rush to grid up for the next race and was a bit flustered. But he started well and got caught up in a brave, race long tussle with one of the shining lights in F5. Then half way round the last lap he ran out of petrol.......Soooooo Classic.........
Buckets in his rush to get to the grid had forgotten to fuel up his 50..........
But he pushed in for a fourth, it seems Buckets4me never gives up, or stops smiling…..…
A great day and fun for all…….perfect…….
Forum whore
I'm still laughing and swearing about it now
Then as the race of his life was unfolding, inexplicably in front of the pits and everyone watching he swerved off the track, pulling a sharp right at mach 9 into the infield. His ride had developed a mind of its own.
When he came to a stop we could see the back wheel was flopping all about.
tiped the bike into the infield corner and coming out I touched the peg on the ground (little bit of a fright but nothing realy) Next thing I know the bike has spat me into the grass and I'm trying to get back to the track without smashing into anything coming arount the track . Next corner was ok same with the one after, then right infrount of the pits I thought someone had hit me as the back of the bike came around spitting me back into the grass. Gave it some gass and got a good snake on with the wheel spinning in the grass, thought something was a bit up and looked behind me to see the bike had rear wheel stearing. parked the bike on the infield and decided to have a proper GP rant and rave at the bike.
all in all it was a great day and i had only gone out to run the 50 up and see if it was still ok after the TRRS anyway so to get such a good start and have a few realy good laps (would have been my 3rd win every and 20 points) I came home with a 3rd and 4th DNF and last or near enough to it (was buggered from pushing the 50) all good fun
thems the highs and lows of racing
"Instructions are just the manufacturers opinion on how to install it" Tim Taylor of "Tool Time"
“Saying what we think gives us a wider conversational range than saying what we know.” - Cullen Hightower
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