SpecificationsHign-concerned Chemical:NoneItem Length:0inchDisplacement (ml):400No. of Cylinders:4 CylinderSpecial Features:Direct replacements for the original partsItem Diameter:0inchItem Weight:330gItem Height:0inchItem Width:0inchExternal Testing Certification:iso9001Model Name:CB400 SF NC 31 36 CBR 23 29 CB 400 CB-1 CB1Brand Name:Road PassionItem Type:enginesMaterial:Strength SteelInclude: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 nameRoadPassionProduct typeIntake Exhaust Stem Valve Guide SealMaterialStainless steelConditionDirect replacements for the original partsQuantity1 Pair / 8 PairsFit For HONDA:CB400SF 1992-1998 NC31 NC36 /CBR23 NC231989-1990 CBR29 NC29/CB-1 1989-1990