CRF 300 venttiilien säätö.
Valvoja: Moderaattorit
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Kikru
- Viestit: 118
- Liittynyt: La Huhti 12, 2014 12:56 pm
- Pyörä: CRF 300 L ja TY 250
- Paikkakunta: Tussuby.
CRF 300 venttiilien säätö.
Videoita varmaan löytyy, mutta onko käytännössä minkälainen jumppa ?
Viraton, varaton, vastuuton, mutta velaton ja ylpeä siitä.
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Kikru
- Viestit: 118
- Liittynyt: La Huhti 12, 2014 12:56 pm
- Pyörä: CRF 300 L ja TY 250
- Paikkakunta: Tussuby.
Re: CRF 300 venttiilien säätö.
Noniin, asia lienee selvitetty perinpohjin jonkun toisen aiheen alla, tai sitten ei vaan tietoa ole...
Viraton, varaton, vastuuton, mutta velaton ja ylpeä siitä.
Re: CRF 300 venttiilien säätö.
Ei videota, mutta AI vastaus:
To adjust the valve clearance on a Honda CRF300L (or CRF300 Rally), set the engine to Top Dead Center (TDC) on the compression stroke, remove the valve cover, measure gaps with a feeler gauge, and swap under-bucket shims if measurements fall outside the cold specs: Intake 0.16 ± 0.03 mm and Exhaust 0.27 ± 0.03 mm.Specifications and IntervalsRecommended Check Interval: Every 16,000 km (10,000 miles) (though owners on platforms like ThumperTalk note these engines hold clearances very well past 24,000+ km).Intake Clearance (Cold): 0.16 mm ± 0.03 mm (Acceptable range: 0.13 mm to 0.19 mm)Exhaust Clearance (Cold): 0.27 mm ± 0.03 mm (Acceptable range: 0.24 mm to 0.30 mm)Preparation and DisassemblyStrip Parts: Remove the seat, side shrouds, and fuel tank to get clear access to the top of the engine. Clean any dirt around the valve cover area so debris doesn't fall into the engine.Remove Valve Cover: Disconnect the spark plug cap and breather hose, then remove the valve cover bolts and lift off the cover carefully.Set to TDC: Remove the timing inspection caps on the right side case. Turn the crankshaft counterclockwise (or clockwise depending on access plug view) until the "T" mark aligns with the index notch, and the punch marks on the camshaft gears line up level with the top edge of the cylinder head. Ensure the rocker arms have a tiny bit of free play (wobble), meaning you are on the compression stroke.Measuring and AdjustingMeasure Gaps: Slide clean metric feeler gauges between the cam lobes and the valve lifter buckets. Record your exact numbers.Calculate New Shims: If a clearance is out of spec, remove the camshafts and lift out the valve buckets to find the current shims underneath. Measure the thickness of the old shim using a micrometer. Calculate the new shim size required to bring the clearance back to the middle of the spec range.Reassemble: Install the correct new shims, grease/oil components lightly, torque the camshaft caps carefully if removed, and button everything up. Torque the small valve cover bolts strictly to 84 in-lbs (7 ft-lbs)—do not overtighten, as they thread directly into the head. Rotate the engine manually a few times and recheck the gaps.
Sanoisin, että niin kauan helppoa kun välys on mittojen sisällä, mutta ellei niin työläin vaihe on lähteä etsimään oikean paksuisia paloja, varsinkin Brandilta.
To adjust the valve clearance on a Honda CRF300L (or CRF300 Rally), set the engine to Top Dead Center (TDC) on the compression stroke, remove the valve cover, measure gaps with a feeler gauge, and swap under-bucket shims if measurements fall outside the cold specs: Intake 0.16 ± 0.03 mm and Exhaust 0.27 ± 0.03 mm.Specifications and IntervalsRecommended Check Interval: Every 16,000 km (10,000 miles) (though owners on platforms like ThumperTalk note these engines hold clearances very well past 24,000+ km).Intake Clearance (Cold): 0.16 mm ± 0.03 mm (Acceptable range: 0.13 mm to 0.19 mm)Exhaust Clearance (Cold): 0.27 mm ± 0.03 mm (Acceptable range: 0.24 mm to 0.30 mm)Preparation and DisassemblyStrip Parts: Remove the seat, side shrouds, and fuel tank to get clear access to the top of the engine. Clean any dirt around the valve cover area so debris doesn't fall into the engine.Remove Valve Cover: Disconnect the spark plug cap and breather hose, then remove the valve cover bolts and lift off the cover carefully.Set to TDC: Remove the timing inspection caps on the right side case. Turn the crankshaft counterclockwise (or clockwise depending on access plug view) until the "T" mark aligns with the index notch, and the punch marks on the camshaft gears line up level with the top edge of the cylinder head. Ensure the rocker arms have a tiny bit of free play (wobble), meaning you are on the compression stroke.Measuring and AdjustingMeasure Gaps: Slide clean metric feeler gauges between the cam lobes and the valve lifter buckets. Record your exact numbers.Calculate New Shims: If a clearance is out of spec, remove the camshafts and lift out the valve buckets to find the current shims underneath. Measure the thickness of the old shim using a micrometer. Calculate the new shim size required to bring the clearance back to the middle of the spec range.Reassemble: Install the correct new shims, grease/oil components lightly, torque the camshaft caps carefully if removed, and button everything up. Torque the small valve cover bolts strictly to 84 in-lbs (7 ft-lbs)—do not overtighten, as they thread directly into the head. Rotate the engine manually a few times and recheck the gaps.
Sanoisin, että niin kauan helppoa kun välys on mittojen sisällä, mutta ellei niin työläin vaihe on lähteä etsimään oikean paksuisia paloja, varsinkin Brandilta.
Re: CRF 300 venttiilien säätö.
Joskus kun välys on vain nätisti tiukan puolella olen käyttänyt eri karkeuksisia timanttiviiloja säätösimmien ohentamiseen, muutama satku lähtee pienellä vaivalla etenkin rouheammalla karkeudella.
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RalliJari
- Viestit: 19
- Liittynyt: Su Loka 01, 2006 8:18 pm
- Pyörä: SuperTen 1200 -10
- Paikkakunta: Iisalmi
Re: CRF 300 venttiilien säätö.
Tuohon AI selostukseen lisäisin että 250:sessä ja 300:sesä koneessa ei tarvitse nokkia irrottaa, keinuvivut irrottamalla saa shimmipalat pois.