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Thread: Carbon Desposits on Piston crown and in combustion chamber of dyl 70.[pics attached]

  1. #1
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    Default Carbon Desposits on Piston crown and in combustion chamber of dyl 70.[pics attached]

    hi
    my bike was very noisey its idle was not good. moreover after some ride for half an hour it would die. did tuning but issue wasnt solved checked for intake leaks no leak was found. so though may be there would be some carbon deposits in the chamber .. so opened the engine.. cleaned the piston crown with wd40 and petrol and razor ,, repacked the engine cylinder was very nice and had a beautiful cross hash design on it,, after the entire process the change is only in bike sound and its idle ,, now its idle is very smooth and calm no vibration ,, and also the issue of bike dying after sometime is solved,, did all my self,,
    here are snaps..
    just look at the carbon deposits at the piston and the gasket,,
    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258193

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258194

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258195



    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258197

    afte some cleaning with wd4 and petrol assited by tooth brush,, not good clraning but ok
    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258198

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258199

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258200

    look at the cut on the piston for exhaust and intake these cavities were fully filled by carbon deposits,,

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258201

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258202

    at last the word IN on piston is visible

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258204

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258205
    more wd-40 to loss the rusted carbon,, and then agaimn using shaving razor blade to scrub the dirt,,

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258206

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258207

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258208

    at last the piston crown is clean not good but much better then it was,,

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258212

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258213

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258214

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258215

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258216

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258220

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258221

    cleaned combustion chamber ,, it is located in cylinder head,,

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258222

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258223

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258224
    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258241

    measuring the exhaust valve of e22 head ,, it is 20 mm
    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258242

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258243

    and the intake side of the e22 cylinder head,, it is 22 or 23 mm,, since i hav no vernier to measure it exactly,
    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258244

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258245

    diameter of the combustion chamber seems to be 49-50 mm but not sure about it ,, gues it for ur self,,

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258246

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258247

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258248

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258249

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258250

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258251

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258252

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70.[pics attached] - 258253 Carbon Desposits on Piston crown and in combustion chamber of dyl 70  pics attached

    the dirty combustion chamber,, before it was cleaned,, look at the oily layer at the sides,, was due to head gasket leak,,

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258254

    Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258255Carbon Desposits on Piston crown and in combustion chamber of dyl 70pics attached -258256

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  2. #21
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    a little bit bump .. cd 70 cd 100 and chonda 70 and 100 all have same size of valves .. 23mm for in and 20mm for exhaust ..

    can someone tell me how is the piston of cd100 ? is that doomed shape with pockets for valves ?

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