3rd down tube Excelsior

[29 excelsior]

Any idea's on this excelsior with a third down tube added to @ 1929 /30 duplex frame?
I have other images of same frame different bike. Did some of the colonies add bracing tubes?
light weights also had added bracing as I have seen on 1929 149cc
no it doesn't appear  in the sales brochure.
cheers tony
29 excelsior

[29 excelsior]

wrong attachment sorry

[rogerwilko]

Probably added by previous boffin, not seen such an arrangement before. Here's a J.A.P special me and a mate made up using B31 frame with Matchy front end and wheels with C11 tank. Blasphemy!!

[29 excelsior]

rogerwilko,
thanks for reply, I have seen your bike previously,I believe it is better too have your bitsa bike running and usable than sitting around waiting for that unobtainable correct part. enjoy riding your bike it is better than looking at it hoping one day to bring it out with all "correct" factory finish.
 
Riding old bike may prompt someone too say

"they know where the right bits to finish off bike are"

.or know some one's uncle has one in an old shed,
as do so many bystanders seem too.

Over and out 29 excelsior

[rogerwilko]

I forgot to say how envious i am of your Excelsior, absolutely beautiful. Regarding the special, we simply bought the motor off ebay and collected appropiate parts at swapmeets. We have no idea what brand of bike it originally came off. We lucked out with the 4 speed burman box but it had a wrecked mainshaft so had a complete new one made from scratch! I  think the motor probably came from an OK Supreme as they had the dry sump motor fitted as well as this particular burman box. Has your third downtube been sweated on or migged, arc etc?By the way, Excelsior, OK Supreme and Levis are my  favourite looking bikes.

[29 excelsior]

another excelsior with 3rd tube.fitted with MAG engine.
I am building a 1929 Excelsior 500cc OHV JAP model 9 racer
the 29 frames have the same 7/8" duplex down tubes  as my 250cc villiers  and 350cc JAP frames
they seem a bit light for a 500 and someone of my weight.pondering modifying strengthening my 500 frame
.
all above photos are not my bikes and don't know any history of them.

will post pics of my 1929 excelsior projects,plus my 250cc Villiers now marked as 29 in excelsior pics on this site
tony
29 excelsior

[29 excelsior]

Can anyone date these Excelsiors? or any info/thoughts duplex frames ended in 1929, single down tube 1930 onwards will ad only known  1929 500cc excelsior pic model 9 racer and even it seems to have a few not quite right parts