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The problem people have with their tanks including me isn't caused by the tanks being out of the frame, I struggled to get mine out.
What happens is if you fuel contains alcohol like most does now the tanks swell, I run on a 50/50 mix of avgas & 91 octane which doesn't seem to contain alcohol & my new tank hasn't had any problems since although I haven't managed to do any riding in almost 6 months
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Make sure there is no damage to either taper, if there is then a you'll need to remove it so the tapers lock together properly.
A bit of fine wet & dry will work for the crank, using some fine lapping compound between the 2 parts in a twisting motion will match them up, don't go mad on it though as the flywheel will move inwards on the crank if you overdo it
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Pilot jet is first place to look, the choke acts like a separate carb which is why it idled with it on
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If the lever doesn't return by itself then it'll be the spring, you'll need the clutch cover gasket as well.
The job isn't too bad, needs the clutch cover & clutch removing if my memory serves me correctly
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The thread of the brake light switch is a standard m5 from memory, the adjuster it fitted into is either m7 or m9x1 from memory, easy to buy an off the shelf aluminium adjuster that fits from any number of dealers
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Easiest to pull the rear wheel out then the 2 clips that hold the pads, don't touch the bolts or you'll dump the fluid out of the caliper & need to bleed the system which isn't fun
Don't worry about using a torque wrench for the axle nut, just do it up tight without really leaning on it, you're unlikely to strip the thread even if you do get carried away
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Pretty sure that direct injection is still banned in FIM competition which would prevent any manufacturer doing any serious development on anything other than commuter bikes.
If memory serves me correctly the NSR500 that Ito raced in the 90s used a more basic system than fitted to the Ossa & it was far from perfect, the Bimota Vdue was developed with DI but ended up back on carbs when they didn't have the money to get the setup right
The best part of direct injection is that the fuel is injected after the exhaust ports/valves have closed which means none escapes down the exhaust which helps with both economy & emissions. I'm certain the Motogp teams would use it if allowed for the economy reasons & the manufacturers would have plenty of knowledge through their car making tie ups
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That's not a slight amount of wear on those gears, I see missing parts of teeth etc. What did they come out of?
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I did the change to a 7kg or so lighter bike in 2000 with no loss of reliability & found that the lighter bike was easier to control in 99% of situations.
I much prefer having a bike that I can ride as well at the end of the day as the start than 1 than wears me out, no way would I enjoy a multi day trial as much if at the start of the next day I was sore & tired from fighting with a heavy bike the day before
Certain bikes do have problems but I don't think adding weight in the effected places would be possible without major redesigns & what manufacturer would do that not knowing if the rules are going to change overnight again
Earlier on in the thread Motogp was mentioned as having had the rules changed for the better, have you seen how badly costs have increased since the change from 500cc 2strokes?
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If you're still running the dellorto then a fuel filter isn't really needed as the carb has a screen behind the bolt when the fuel pipe connects to it, length of the pipe shouldn't affect how the filter works so your new filter may be a dud
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You should be able to adjust the spring off for more sag although the photo on splatshops site of the shock shows less thread than the earlier models, get hold of splatshop about the recommended spring length when off the bike
How has the damping adjuster been set?
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Needle rollers have no place in linkages from a engineering viewpoint as the amount they rotate is minimal & they're designed to be constantly rotating, ideal is to make aluminium bronze(work hardens) or more commonly phosphor bronze(has self lubricating qualities) bushings of the same dimensions
Doesn't mean I don't still have needles in my bike but I only because I've never gotten around to making up any at work
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Is the noise happening when the shock compresses or returns to normal position, if it's when it returns to normal position then damping is too light & needs adjusting or a service, if it's when compressed it may be something completely unrelated like the stand
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Look at the back of the cases for engine size, will start with st25 for a 250 or st29 for a 290. Topend end is only difference between the 2 bikes so engine & frame numbers are only a guide to what it began life as
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Peter Boettcher is half the NZ importing team & is on here from time to time
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Don't take it off the carb then, much easier to get on & off the airbox
Pretty sure when I still had the dellorto fitted to my bike the jetting was very close if not the same as Copemech has provided
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Sherco uses normal Dot4 brake fluid rather than mineral oil like the gas gas' use, completely different master cylinder internals in the 2 different brands of bikes
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Different colours are caused by the heat that the exhaust gets to, when heat treating metal using a flame you can see the colour of the metal changing as it heats up & you use the colour change to judge when you're at the required hardness & stop heating
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Isn't the renthal actually made by regina anyway?
I used to use an o-ring on my jt35 in the 90s but since I've had shercos I find the better regina lasts well, a lot of guys use did mx chain but the 1 they really liked isn't available anymore
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The thumb on the engine cases is standard for the early models, can't quite remember whether the front guard had any stickers on it but will have a look through my stuff from back then when I get home from work in the morning tomorrow
The 99 & 00 bikes had laquer over the top of the stickers, think you couldn't buy the stickers seperate
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Just the o-ring, quick job to do. May as well do the 1 where the midbox joins the muffler at the same time
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Looking at the photos of the thorns & your description of what happens I'm guessing that Michelin x-lites aren't used there
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Far easier to remove the front tank mounting bolt & fold the cdi etc out of the way, I've used both methods & prefer this 1 as theres no messing about trying to get the cap out of the way to see the level or struggling to get it sitting flat before screwing it back down
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What age is the bike & check the condition of the fingers in the basket while you've got the plates out. If the basket has grooves from the plates you'll either need to file them out or buy & fit a new basket which along with the rivets & rubber dampers at the same time will cost you about 50quid from splatshop, quite an easy job to do & there is a tutorial on their site in the blog section which explains it well
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Drain screw is the lowest case screw below & slightly in front of the sprocket, has been the same on all shercos I've owned including a 99.
When you take the airbox off for cleaning leave the connector on the carb as it's much easier to slide the airbox into it than try & get it back onto the carb properly
I have good memories of my 99 bike, not the most powerful available at the time & heaps lighter than the gas gas jt35 I sold to get it
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