The 101 Association, Inc.
For the preservation and enjoyment of 1928 to 1931 Indian Scout Motocycles
"You can't wear out an Indian Scout"
 

valves and guides

  • 22 Nov 2017 3:03 AM
    Message # 5597448

    Hi, I need to know all the dimensions of the valve guides and valves for the 45" 101 engine.  Have just received a new pair of cylinders from Greg Hutchinson and now understand that it is not just a simple matter of bolting them straight on.

    Mike.

  • 22 Nov 2017 3:13 AM
    Reply # 5597452 on 5597448

    Section 30 in the R&O has instruction and drawings of the valves, guides, seats and springs.

  • 22 Nov 2017 6:52 AM
    Reply # 5597527 on 5597448
    Hi Carl, well I missed that, best have my eyesight checked !!

    Thanks,

    Mike.


  • 30 Oct 2018 6:28 AM
    Reply # 6879191 on 5597452
    Carl-Erik Renquist wrote:

    Section 30 in the R&O has instruction and drawings of the valves, guides, seats and springs.

    Hi Carl, Section 30 is about the 45'', are there instruction and drawings for the 37"?
  • 31 Oct 2018 3:35 AM
    Reply # 6882096 on 5597448
    Tim Raindle (Administrator)

    Hi Mike, check size of the holes, the guides MAY need to be a couple of thou oversize from original. Looking for around 0.0015" interference fit off the top of my head, check that too. 

  • 31 Oct 2018 5:08 AM
    Reply # 6882148 on 5597448

    I don't have actual measures, sorry. It was a long time ago I fettled with 37ci valves, but isn't they same as 741 valves?  In that case they are easy to obtain even NOS and cheap. The guides in some cases has to be custom fit to the hole size as Tim suggests. Be sure they are cast iron, brass guides or -sleeves doesn't seem to work well.


    Last modified: 31 Oct 2018 5:18 AM | Carl-Erik Renquist
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