Specifications Hign-concerned Chemical:None Item Length:0inch Displacement (ml):650 No. of Cylinders:1 Cylinder Special Features:Direct replacements for the original parts Item Diameter:0inch Item Weight:370g Item Height:0inch Item Width:0inch External Testing Certification:iso9001 Model Name:F 650 F650 ST Brand Name:Road Passion Item Type:engines Material:Strength Steel Include:1 Set (1pc Intake Valve Stem+1pc Exhaust Valve Stem) We focus on the production of various types of motorcycle accessories, from tiny parts to large and heavy parts that can be purchased and used. Symptoms of motorcycle valve loosening: 1. As long as the valve clearance is not suitable, it can be adjusted at any time. Generally, it can be adjusted once. 2. Formal adjustment requires a feeler gauge to measure. Generally, the valve clearance is different depending on the model, the clearance is about 0.05-0.08, and the scooter can be larger 3. The valve clearance must be adjusted to normal. Too large or too small is not good, and it cannot be adjusted to increase or decrease artificially. Too large or small has only shortcomings and no advantages. 4. The valve clearance must be adjusted when the car is cold. The valve clearance will change when the car is hot, and it should be subject to the cold state. If you feel the power drops and the idle speed is unstable after the adjustment , the gap should be adjusted down, and you should adjust it in time. Brand name RoadPassion Product type Intake Exhaust Stem Valve Guide Seal Material Stainless steel Condition Direct replacements for the original parts Quantity 1 Pair / 2 Pairs Fit For BMW: F650 1992-1999 F650ST 1997-2000