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1Back to top Go down   cylinder head/valve seats Empty cylinder head/valve seats Fri Jun 18, 2010 9:18 am

Rob Roy Mcgregor

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Hello .
Be gentle im new to this cylinder head/valve seats Icon_arrow
I read somewhere that k1 83 > 85 were built to run on leaded fuel. my bike is an 85 but i dont know if its a lead head version or the unleaded version . just bought the bike with no hand books or anything so was wondering if there was a way of using the engine number to find out . . also if it was a lead head would a head of a say 85 > fit to save the hassle of machining & sticking in hardend seats etc . cylinder head/valve seats Icon_arrow Im prety confident some one on here knows the answer cylinder head/valve seats Icon_biggrin

    

2Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 12:05 pm

Crazy Frog

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Give us the last 7 digits of your VIN #.
From that we can find the year/month of manufacturing.
I believe only the 83/84 were built to run on leaded fuel.

Bert


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cylinder head/valve seats Frog15cylinder head/valve seats Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

3Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 2:39 pm

Rob Roy Mcgregor

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Crazy Frog wrote:Give us the last 7 digits of your VIN #.
From that we can find the year/month of manufacturing.
I believe only the 83/84 were built to run on leaded fuel.

Bert
Hi bert thank you does this help
frame *0018780*k100rs
engine*104ea288416531*

    

4Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 2:56 pm

Avenger GT

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http://www.bmbikes.co.uk/enginechassis.htm

http://www.bmbikes.co.uk/chassispages/enginechassisK100.htm

Two useful links for working out when your bike was made and whether it will run on unleaded. Looks like yours was built in July 1984, and is built for leaded. If you are only going to use the bike for leisure/pleasure riding you might be as well off using a lead substitute like Castrol Valvemaster Plus. A 250ml bottle will treat 250 liters of petrol and its very easy to measure.

    

5Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 3:05 pm

Rob Roy Mcgregor

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Thank you, looks like your correct . .so does an 85 cylinder head/valve seats Icon_arrow unleaded head fit as a replacement then cylinder head/valve seats Icon_question

    

6Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 3:17 pm

Avenger GT

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Probably, but I wouldnt know for sure.

    

7Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 3:23 pm

Rob Roy Mcgregor

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thanks there , cylinder head/valve seats Icon_wink also wondering if the seals o rings etc have to get changed to accept unleaded cylinder head/valve seats Icon_question

    

8Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 3:30 pm

Avenger GT

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No, the only thing unleaded affects is the exhaust valves and valve seats. You must have harder valve seats because of the lack of lubrication / "cushioning effect" provided by the lead.

    

9Back to top Go down   cylinder head/valve seats Empty Re: cylinder head/valve seats Fri Jun 18, 2010 3:34 pm

Rob Roy Mcgregor

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thanks at least thats one job off the arms length list cylinder head/valve seats Icon_wink . .

    

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