The New And Improved Unofficial R65 Forum V2

Technical Discussion => Discussion about "Lesser" makes, er, Non-BMW ;-) => Topic started by: dav on June 24, 2010, 08:20:07 AM

Title: Indian 1915 8 valve boardtrack racer
Post by: dav on June 24, 2010, 08:20:07 AM
Picked this up from ADVrider.

http://www.youtube.com/watch?v=TfEZyCccKTs

& they raced these back in the day!!!!
Title: Re: Indian 1915 8 valve boardtrack racer
Post by: Darwin_R65 on June 24, 2010, 08:24:17 AM
what an awesome bike,
i love the exposed valves, gearbox chain, etc
The bike has an exhaust system, but what's with the air holes at the head?

John
Title: Re: Indian 1915 8 valve boardtrack racer
Post by: aussie on June 25, 2010, 04:13:05 AM
Oh that is SOOOOOOOOO cool. It sounds damned fine for such a vintage bike.

John - it's pretty obvious what the holes are for......to let out the flames!  :o
Title: Re: Indian 1915 8 valve boardtrack racer
Post by: Darwin_R65 on June 25, 2010, 05:57:39 AM
I had a look at the web page advertised on the video and there is a link to a board track race, interesting.

I also found another video of a similar year excelsior
With similar holes in cylinder and flames.
I assume here it's the combustion coming past the rings, perhaps the holes are to prevent pressurising the sump??????????
I'm curious now as to just why they ported the head and cylinder.
http://www.youtube.com/watch?v=lRTGbIX3pSY

John
Title: Re: Indian 1915 8 valve boardtrack racer
Post by: dav on June 25, 2010, 07:14:23 AM
John, when i first watched the vid i was thinking "what the ...." & iam still clueless, someone on here must know why there are flames coming out of the holes.

I was also thinking on the same lines about helping release the pressure.
Title: Re: Indian 1915 8 valve boardtrack racer
Post by: Mike V on June 25, 2010, 03:02:27 PM
Did these guys wear fire proof pants?! Must be hell on the inner thighs. Must be a brilliant sight on an evening ride.
Title: Re: Indian 1915 8 valve boardtrack racer
Post by: Rob Valdez 79 R65 on June 26, 2010, 01:42:12 AM
I've no clue.



Quote
Did these guys wear fire proof pants?! Must be hell on the inner thighs. Must be a brilliant sight on an evening ride.


Sure beats LED's under your bike!  ;D