Question about 1990 Suzuki DR 650 RS

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(1990 dr 250) i feel like i have lost power in my motorbike

I have a 1990 suzuki dr 250 and i just feel like i have lost alot of power and i was just  wondering if you no how i can get it back and possibly increase it from what it once was... thanks

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  • Domodude Jan 16, 2009

    thanks, how do i put new clutch plates on, and are they expensive? ans also it seems to be abit front heavy, any ideas how to make it lighter

  • Domodude Jan 16, 2009

    but the cable is old school and is just one whole thing, it can not be udgusted there is no place to udgust it on the handle bars, im in australia by the way and am about 6 foot so... yea

    and when i pull the clutch in its really rough and scweeks and scrunchs... is this the cable, should i get a new one?

    thanks mate

  • Domodude Jan 16, 2009

    this is when the bike is off and on



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First, check your fuel line. Old bikes' fuel lines get clogged with ****. Follow your fuel line from your fuel tap to the carb. Turn off the fuel at the tank and unclip the butterfly clips on the fuel line, then soak the line in clean hot water - NO WASHING UP LIQUID! Let it dry out completely before you reattach it. While that's off, check the carb. If you know how to remove it then remove it and give it a clean. If you don't know how then don't try. If you accidentally pierce the diaphragm then it's buggered. Clean the air filter! I can't remember where it is on that engine exactly, but clean the filter out and the engine should breath easier. Remove the spark plug and brush it off with a wire brush. You could replace it with a hotter plug if you want to a bit more out of the engine, but I doubt it will make a significant difference on a single cylinder engine. Check the valves i you know how. If the outlet valves are clogged with soot then the engine is trying to burn its own exhaust every time it fires! Dismantle the exhaust and check the baffle. If the baffle is broken then it could be suffocating the engine. If you want extra power though, leave the baffle out! Just don't let the police catch you though. Make sure your drive chain is taught. No more than 1 inch of play in the chain! Make sure it's well lubricated too or you'll be losing power just trying to get the chain to turn. Each link should move freely. If you want a bit more acceleration, buy a new sprocket with fewer teeth. If it feels like you have to rev the bike more than you used to you may need to replace your clutch plates because they could be slipping a bit. Finally check your brakes. Left each end of the bike off the floor and let the wheel spin. They should spin freely, at a consistent rate, and hardly slow at all. If there is resistance, take your calipers apart, clean them out with brake cleaner, make sure the pads are ok, scrub your disks and replace the calipers. Do not attempt any of this though unless your confident you can do it! Take your time, pay attention to where bit came from so they can go back! And most importantly, don't go straight out afterwards and try and drag race the thing! Run it slowly and carefully for a while, just in case you knackered something, especially after you've done the brakes!

Posted on Jan 16, 2009

  • daniel_gande Jan 16, 2009

    if your forks are too soft it can give the impression it's front heavy when you ride. If you can then adjust the pre-load on the forks or fit some progressive springs. Also, if you're short then having a lowering the back end will lessen the feeling of a front heavy bike. If you're not too short for the bike, just try softening the rear shocks' pre-load so it sits slightly lower when you're sat on it. This shifts your weight back on the bike.
    This just makes the bike "feel" less front heavy. If you want it to physically BE less heavy, then you will have to remove things like fairing etc but I would start with progressive springs first.
    As for the clutch plates, I dunno how much they're likely to cost in the US (I'm in the UK).
    You're best taking it to a suzuki dealership as they will be able to source an original clutch and fit it for you, usually fairly cheap too.
    I just thought too. Just check the clutch cable on the bike. It will link to the clutch housing on the gearbox. Make a pencil mark on the engine where the clutch lever is, then unclip the cable. If the lever return is further back than your pencil mark then your cable is too short and you've basically been riding the clutch just slightly the whole time. Reconnect the cable and you should be able to adjust it on the bars using the screw nut on the hand lever.

  • daniel_gande Jan 16, 2009

    I would suspect the clutch cable is your problem then. You should be able disconnect it from the handlebar lever. When you do, get some liquid lubricant and run it down the inside of the clutch cable hose. hold it vertical for a while (if it's really bad just tie it to the ceiling and leave it there overnight.)
    It sounds like the cable has dried out so it's not moving freely within its housing. Letting to oil run through should make it run nice a smooth.



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