Question about 2008 Beta RR 250 M

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Chains slacken off

I own a 1998 RR 400 and have been having a lot of problems with the chain slack. I do around 250 miles per week in all weathers. I adjust the chain every weekend but within 100 miles or so of adjusting it to the correct slack it is already 'stretching' to around 40-50mm of freeplay

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Way outside the recomended slack (which is 20-30mm). Any suggestions as to what could be causing this? I am thinking there are two options: 1) the chain and sprockets are shot and need urgent replacement. 2) the rear axle bolt is shot and despite being tightened to the correct torque it is loosening as I ride. Has anybody got any advice on this? Any feedback is welcome. Adjust the chain to spec then mark the adjustment slider and the swingarm at a common piont on both sides of the wheel. Use a paintpen or steal some nail polish for this. Then see if the wheel moves as the chain slackens off when you ride. It sounds like your chain and sprockets are toast though.......,,

Posted on Nov 10, 2008

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Jerking at low speeds.


Hi, possibly a fuel problem try new good grade fuel also worth trying a fuel system cleaner. Sometimes the drive chain can be the culprit make sure it is showing the right amount of slack. Your owner's manual will give you the right figure. A tight chain is as bad as a slack one.

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What sort of problems?
Slacken off the adjusters, slip the chain onto the rear sproket and adjust the slack.

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I have a 2006 250 Virago, I think the chain needs adjustment. How do I do this? Thank you !


There are videos in the link. The one for your bike is in Spanish, but just watch the picture, it is easy.

Basically, you slacken off the wheel axle bolt a bit. Then you turn the adjuster nuts on both sides the same amount, perhaps a quarter turn, then check the slack in the middle of the chain at is tightest part. Most chains have a tight section. Tighten up the axle and check again. In my experience, it goes tighter as you tighten the axle nut.
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May 12, 2011 | 2005 Yamaha Xv 250 Virago S

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Bought a 03honda cbr 600rr, front sproket had been changed out and rear tire moved back. chain is loose 2"+ in slack but i can not move tire back any further in swing arms. can I move rear tire up and...


hi, prob good idea with this will be to slacken off the wheel push the wheel forward and fit a chain the correct length for the set up you have, count the links in the chain you have on the bike and get one 2 links shorter, mark a link on the chain with paint or sim turn the wheel and count the link plates, ie 1 plate is 2 links, so start on the 1 next to the marked 1 turning the wheel counting the plates 2 4 6 8 10 etc and end on the marked 1 this will give you the number of links already on the bike

Jan 15, 2011 | 2003 Honda CBR 600 RR

1 Answer

Just bought a cougar for £200 she needs a bit of love. Firstly the chain is slack does any one know how to tighton it ? and it had a new battery in december 09 and its worn out is there a...


hi, with regards to your chain,
if your slacken the rear spindel bolts but dont take it out, the wheel becomes free, then you have adjusters either side on the swing arm were the spindle goes through,
i belive its either a 12mm or 13mm spanner and tighten the adjusters untill the chain becomes tighter, u need roughly about hald 2 - 2.5 cm slack on the chain so it does not snap.
then do up the spindle bolts and check the alignment on the adjusters, if theres both the same then your good to go. (remember to loob the chain befor you ride it though)

Nov 02, 2010 | 2001 Gilera Coguar

2 Answers

Chane slack


Slacken the wheel nut a couple of turns ,then simply adjust tension with the chain adjusters at the rear of the swingarm legs. Look carefully you will see notches marked on both sides of the swingarm by the wheel spindle these must be the same on both sides, your manual will tell you the chain slack for your bike.probably about 25-35mm put a ruler up to the chain and using finger pressure push up on the chain ,this is the chain slack. Once done tighten the wheel nut up to correct torque setting.( manual or call local dealer),then replace split pin with new through the wheel nut. Double check all your work no loose nuts,then sit on the bike get a friend to wiggle the chain there should be small slack as first meashured 25-35mm again, if not re-try,once experienced you will do it first time.

Mar 04, 2010 | 2000 Honda VFR 800

1 Answer

Bike is a 2005crf250x. Need timing chain slack.


Lift the chain with one finger then turn the crankshaft several full turns by hand. Inspect the full length of the chain during rotation. Any obvious damage? Does the chain revolve smoothly around your finger? If all seems okay then the problem is probably not in the lower end. Some chains are continuous and do not have a master link. Some do have a master link. If you have a master link then separate the chain by removing the link then place both ends of the chain onto the cam sprocket and reconnect the link. If you have a continuous chain I would need to see first hand what is going on. In any event, be certain the timing marks on the flywheel and overhead cam are correctly lined up during installation.

Feb 26, 2009 | 2005 Honda CRF 250 X

2 Answers

Chain keeps coming off


Sir,
What you need to do is adjust the rear wheel to take up the slack in the drive chain.
You by now have possibly ruined both the sprockets where the chain need to be securely located.
To take out the slack the wheel spindle will have to be loosened and adjusted by the two clamps around it they are on each side of the swing 10mm nuts used for this purpose.
To replace chain and sprockets the wheel needs to be removed so I suggest purchasing a Haynes manual or similar to study involvement.
Good Luck!
Paul 'W'
Onyer~EDson(:0) {#><U.K.
Please remember to politely rate my effort!

Jan 21, 2009 | 2002 Honda CR 250 R

1 Answer

Chain problem


I noticed a repetetive whirring coming from somewhere near the front sprocket- Or at least I'm pretty sure that's where it's coming from. It's not quite a grinding but it sounds like some sort of contact problem. I jacked up the bike, and the rear wheel spins freely in neutral except for a small area which seems to need just a *little* more force to spin around. Not sure if it's from the rear wheel or from whatever might be wrong up towards the front. The noise has an accompanying gritty feel, which rather reminds me of a bent rotor rubbing lightly at a certain point once per cycle on the brake pad. No amount of variation of pressure or speed in braking seems to affect the problem. There's no obvious performance issues, and I only hear it when I've got the clutch pulled in (probably because it's not loud enough to hear over the exhaust, not because it isn't happening). I ran the bike downhill in neutral and it still makes this noise. I lubed and adjusted the chain a day or so ago, and the adjustment notches are at the same point on each side. I had also ridden over a set of train rails cut deeply into the road, but I doubt that had much impact on anything. Any ideas?,Sounds like your chain may not have stretched evenly. You also may have it adjusted too tightly. You should always adjust the chain so that you have the specified slack at its tightest point. Do you know how many miles/KMs are on on this chain/sprocket set?,,,

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