54 plate suzuki vl125 intruder, lack of power ,chain slack,also brakes -back brake feels spongy
Brakes will feel spongy if air is in the brake lines. Bleed the brakes. If the chain is slack then loosen rear axle bolt and adjust the chain by moving entire wheel back. Lack of power and taking time to build up speed are usually problems resulting from burnt exhaust valves. Intake valves burn less often than exhaust valves because intake valves have cool gas flowing past them in the intake stroke.
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some uneven wear on exhaust rocker face & corresponding cam lobe (Suzuki DF125)
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