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Thread: hero rf 70 help required

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    Default hero rf 70 help required

    guys my o8 hero rf 70 with 25k kms on clock is letting me down after i used it like yb100
    iits heating up a wiered cam sound from head and it stops after being heavy mechanic says the oil jali is closed and we need a new cam n rockers. my question to 70 cc experts is that how can i juice more power from the 70cc engine. m numb in 4s so i need opinion of u guys
    @asjsdm the carb is pz22 tell me about some mods

    legend will revive soon

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    hmm btw stock ma gasket bhoth pathli hothi ha .. after market gaskets are realy realy fat .. and compression ka maza nai atha un sa ..

    konsay kharadia ko dia ha ?

    Quote Originally Posted by hidalgo View Post
    cylinder is with kharadya for boring .and m keeping it stock yar . no time for that much hastel

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    its at adyala road .naeem g engineer ko
    legend will revive soon

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    lamba nai ho raha process ?
    when i did my friends bike overhaul we did it all in 2 hours .. bore head work crankcase rod all bla bla.. did all from mohamdi autos.and their kharadia..

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    m chilling in office my mechanic friend is taking care of all of it
    legend will revive soon

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    plus not in hurry . its a lil smal projct
    legend will revive soon

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    hmm trhats nice .. waiting to liusten the good news about it .. getting a new life

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    she got a new life. i only installed new oil jali new piston rings purposely. nothing else . oil jali was not fully blocked . i used havoline oil . just rode it 2 kns back home. hope for the best .plus sound ma farak para ha aur bike is v smooth now
    legend will revive soon

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    good cam and rocker woi chal gaya ?

    Quote Originally Posted by hidalgo View Post
    she got a new life. i only installed new oil jali new piston rings purposely. nothing else . oil jali was not fully blocked . i used havoline oil . just rode it 2 kns back home. hope for the best .plus sound ma farak para ha aur bike is v smooth now

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    yes boss v minimal sound
    legend will revive soon

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    zabardast .. kharcha kitna hova .. and now running araam sa karo .. and show some kindness to it .. as she is very delicate

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    150 kharadya 260 oil 300 mazduri i lost bill i guess 500 or 450 for piston set
    legend will revive soon

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    34 kms done till today . smooth n slow keeping it at 40 is pain 45 tak chala jata ha but no heavy throttel and clutch usage.
    legend will revive soon

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    u can go till 50 no problem .. and do vary the speed .. do not keep it constant for long time ..

    also check the oil quality after few hundred kms.. u should change it at 500-800 as there is only piston swap .. rest is already chaloo bike ..

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    thank sir
    legend will revive soon

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    @Asjdsm,I liked ur idea of putting thin gasket of head cylinder to get more compression.So i opened head of YB to put thinner gasket.
    Also did come carbon cleaning.Silver 1 is new gasket i bought & other is old 1 which seems thick.
    But then a naughty idea came in ma mind "No Head gasket"
    Lets see how it turns out.
    Piston crown seems oval.Cylinder Gasket was already paper.
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    I Am the Feel
    I Am The Yamaha!

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    nawty nawty nom1 . watch out yb ne kuj karnama na kar de. bdw my self tuned yb ran like a dream .
    legend will revive soon

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    u must use jaain/gasket b/w head and cylinder ..
    that will reduce the vibrarations .. or dampen it ...
    on 4 strokes jain is needed to guide the oil flow from engine to head as well .. in two stokes its not the case ..

    u can make a custom jain ..

    do update us about ur results..

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    Ahsan bhai i used silicon.
    Pta nahin mra weham hy ya pick waki pbarh gai hy.
    Tell me ye head phase krana kya hy?
    Combustion chamber ka area km krna ya barhana?
    Head grind krte hain kya?
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    jani yb ka head phase ni krate , jab side crank case pallay in chonda's mostly loose hujate hn to unko phase krate hn
    legend will revive soon

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    Quote Originally Posted by N0m1 View Post
    Ahsan bhai i used silicon.
    Pta nahin mra weham hy ya pick waki pbarh gai hy.
    Tell me ye head phase krana kya hy?
    Combustion chamber ka area km krna ya barhana?
    Head grind krte hain kya?

    yar silicon theek ha .. par meray experimetns ma curil best ha .. kionka it bonds the surfaces like some sort of magic bond .. wheareas silicon just stays there ...

    pick pa kuch na kuch fark parna chaia . .. at least noticble . as i am now using thick gaskets and my pick has drastically reduced ..

    dont know about head phase karna .. yar ya desi lingo bhoth confusing hothi ha .. samaj nai athi ..

    combustion chamber ka area 2 strokes ma bar saktha ha . laikin us sa compression kam ho jaya gi .. jis sa maza nai aya ga .. kam bhi ho sakthi hogi kionka koi valves tho hothay nai 4strokes ki tara .. chamber ma weilding karkay area kam kartha hain goray ... local ka nai patha ... area kam karna sa compression bar jaya gi .. jis sa maza atha ha ..

    head grind ka tho nai patha kia matlab ha ? if it means to resuface a warped head then yes it is done to both 2 and 4 st.. some ppl may grind the head to increase compression ratio ..

    in 4strokes head grind sa aksar matlab valve grinding hotha ha ..not sure about 2t

    nex time give curil a try .. does the head gasket of yb100 leaks ?

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