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I got extra parts with the bike. Does anyone know what bike the one with the question mark is from? thx. Dickwhat is this from?
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what is this from?
I got extra parts with the bike. Does anyone know what bike the one with the question mark is from? thx. Dick
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- Pharisee
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Re: what is this from?
Yep... That's a pushrod rocker arm for one of the "lightweight" models. You can use it on the inlet side of the G80 if you so desire. It will change the ratio of the rockers arm assembly and increase the valve lift. It will give you a little improvement in performance.
I'm from the Fens.... Gimme six.
- ajscomboman
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Re: what is this from?
That isn't a rocker from a L/W John. A L/W rocker arm has a very squared off nose towards the pushrod end as opposed to a rounded point. The smaller arm is from an Iron head original part No FE 60Pharisee wrote: ↑Wed Sep 22, 2021 5:50 pm Yep... That's a pushrod rocker arm for one of the "lightweight" models. You can use it on the inlet side of the G80 if you so desire. It will change the ratio of the rockers arm assembly and increase the valve lift. It will give you a little improvement in performance.
It may well be that the L/W arm is dimensionally the same or very similar though.
- Pharisee
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Re: what is this from?
Ya live and learn..... Thanks for putting me right. I fitted a lightweight rocker arm to my M16S, and from memory, they looked the same. Sorry if I confused matters.Pharisee wrote: ↑Wed Sep 22, 2021 5:50 pm Yep... That's a pushrod rocker arm for one of the "lightweight" models. You can use it on the inlet side of the G80 if you so desire. It will change the ratio of the rockers arm assembly and increase the valve lift. It will give you a little improvement in performance.
John
I'm from the Fens.... Gimme six.
- Rob Harknett
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Re: what is this from?
FE 60 Used on prewar AJS from 1935 inlet & exhaust 250 & 350's also WD Matchless up to 1948 I believe ( iron heads ) was given new pt. no. 017216.ajscomboman wrote: ↑Wed Sep 22, 2021 6:31 pmThat isn't a rocker from a L/W John. A L/W rocker arm has a very squared off nose towards the pushrod end as opposed to a rounded point. The smaller arm is from an Iron head original part No FE 60Pharisee wrote: ↑Wed Sep 22, 2021 5:50 pm Yep... That's a pushrod rocker arm for one of the "lightweight" models. You can use it on the inlet side of the G80 if you so desire. It will change the ratio of the rockers arm assembly and increase the valve lift. It will give you a little improvement in performance.
It may well be that the L/W arm is dimensionally the same or very similar though.
- ajscomboman
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Re: what is this from?
I have done the same conversion and currently have 2 arms sat in a box that's why I can tell the profile isn't the same, however John they may well be dimensionally identical and do the same job. Without laying one on top of the other I couldn't say.Pharisee wrote: ↑Wed Sep 22, 2021 10:01 pmYa live and learn..... Thanks for putting me right. I fitted a lightweight rocker arm to my M16S, and from memory, they looked the same. Sorry if I confused matters.Pharisee wrote: ↑Wed Sep 22, 2021 5:50 pm Yep... That's a pushrod rocker arm for one of the "lightweight" models. You can use it on the inlet side of the G80 if you so desire. It will change the ratio of the rockers arm assembly and increase the valve lift. It will give you a little improvement in performance.
John