I have had a new back tyre put on my ninja 250r and the chain adjuster (studding and locj nut with black cover has come off. the studding has now bent. i dont know much about bikes but can you tell me if the garage would have neede to take this off before putting a new wheel on ??? the stud has bent is it ok to ride ???

The proper sequence to installing the chain should be to first ensure the brake is in the 'unlocked' position then loosen the chain adjustment screw, slip the chain over the back of the sprocket, align the chain with the bar, slip the bar onto the bar mounting studs ensuring the adjustment pin slips into the appropriate hole in the bar. Then slip the outer chain cover over the bar studs, elevate the front end of the bar and tighten the bar mounting nuts to 'snug'. Adjust the chain tension to the desired setting ensuring the front of the guide bar remains elevated, then tighten the nuts to secure the bar.


Remember to unlock the brake BEFORE removing the bar and chain because it is so much easier to unlock it mounted on the saw if yours is the design that comes off with the cover. If yours stays on the block of the saw and the blade is removed you have to secure the saw on the workbench or on the ground and unlock the brake just like you would with the bar installed.

Keeping the front of the bar elevated during assembly and adjustment of the chain will keep the chain tension correct for a much longer period. I hope this helps.

The proper sequence to installing the chain should be to first ensure the brake is in the 'unlocked' position then loosen the chain adjustment screw, slip the chain over the back of the sprocket, align the chain with the bar, slip the bar onto the bar mounting studs ensuring the adjustment pin slips into the appropriate hole in the bar. Then slip the outer chain cover over the bar studs, elevate the front end of the bar and tighten the bar mounting nuts to 'snug'. Adjust the chain tension to the desired setting ensuring the front of the guide bar remains elevated, then tighten the nuts to secure the bar.


Remember to unlock the brake BEFORE removing the bar and chain because it is so much easier to unlock it mounted on the saw if yours is the design that comes off with the cover.

Keeping the front of the bar elevated during assembly and adjustment of the chain will keep the chain tension correct for a much longer period.

Before putting your hands near saw chain cutters, put leather gloves on. Cutters sitting still can still draw some blood.
Loosen the nuts holding the clutch cover, loosen the adjuster, then remove the nuts. Remove the cover. Slide the bar along the studs, free of the adjuster, toward the clutch. Revove the chain from the bar groove, then move it clear of the clutch drive. It's now off. Good time to clean bar grooves and bar-mounting area of dirt & chips.
Reverse the procedure to install a chain, making sure the cutters have their cutting edge facing forward on the top of the bar. Make sure the adjuster is engaged with the bar before tightening the nuts at all.
Holding the bar nose up, tighten the adjuster until the chain touches the bar on the lower side. Tighten nuts.
After short run to clear any debris, recheck the chain tension.

There is a small rectangular cover in the middle of the primary cover ,undo the two bolts that hold it in and you can see the primary chain.at the bottom of the primary case you can see a big nut it's about 24 mm and in the middle is a smaller stud undo the locking nut and wind the stud upwards into the case until the chain has a small amount of slack about 6mm of movement.then lock the nut back.up and refit the small.cover and your done.

Pmorrow1975:

When you can't adjust the chain any more, the chain has stretched so far that you will need to remove the chain and replace it, or the tensioner pawl has slipped out of the bar and the chain tensioner will not work. Let's start with the easier solution. First lay the saw on it's left side so the bar is up and you can see two studs with nuts on them. These nuts hold the bar and side cover on. Remove the nuts (a 1/2 inch socket is what you need) and remove the side cover. The side cover holds the chain tensioner. Check to see that when you put the side cover on, the pawl on the chain tensioner fits into the small hole in the bar. If it does not, adjust the chain tensioner screw (below one of the chain retention stud holes in the side cover) until the pawl fits into the hole in the bar, and reinstall the side plate. You'll be able to adjust the chain tension now. If the chain tension is still too loose when the back of the pawl (visible through the slot in the side cover) is at the back of the slot, it is time to replace the chain as it has stretched beyond adjustment parameters.

Hope this helped.

Oil and filter always a good idea, air filter depends on how many miles the bike has done and whether you're riding in dusty conditions. You may get away with vacuuming it out. As for tyres, yes the bigger profile will fit but does it adversely affect the handling??? Will your insurance pay out if you change the tyre and fall off because of it?
Kawasaki recommend a 120 profile for a reason. Me, I'd leave it the standard size.

Take the side cover off.there should be two nuts holding it on.you can lift the bar and remove chain.put new chain on.you might have too take a screwdriver and adjust bar adjuster too put bar and chain back on.replace cover and snug up nuts.adjust the bar to tighten the chain and then tighten nuts on side cover.

lay the machine on its side motor side facing downwards undo the 2 nuts that hold the cover on then remove cover, pull the chain bar backwards the remove the chain replace the chain making sure that the chain cuts in a clockwise direction then put cover back on, put nuts back on finger tight tension the blade by turning the flat bladed screw clock wise then tighten the 2 nuts up full..

put it on tdc
and go from there
tdc top dead center

Chain adjustment

1. Make sure the chain brake is off (gloves will protest your fingers).
2. If necessary, loosen the bar nuts that are clamping the clutch cover in place (or whatever holds the clutch cover and bar on). They don't need these really loose - finger tight will do.
3. Ease the tension adjustment until the chain is obviously loose.
4. Using one hand, hold the nose of the bar up.
5. While holding the nose up, adjust the tensioner so that the center of the chain just touches the underside of the bar, add a touch more.
6. Continue holding the nose of the bar up & tighten up the bar nuts / bolts / quick-release system. HTH

Lou