Question about 1990 Suzuki DR 650 RS
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
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
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