Knuckle frame conversion

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zippo

Knuckle frame conversion

#1

Post by zippo » Wed Sep 08, 2004 2:47 am

Anyone have any tips on welding and cutting a knucklehead frame so i can put a panhead in it.about a 1/2 wedge is already in the neck.how long a set of tubes do you think i need?



relic
Posts: 15
Joined: Mon Jul 16, 2007 5:12 pm

Re: Knuckle frame conversion

#2

Post by relic » Fri Sep 10, 2004 7:52 pm

I use to have pan engine in Knuck/Flatheadframe,I was very busy and eager to get on the road. So converting was made with some violence and welding torch.
Problem was that there is not enough space for rearhead and valvecover.Rough solution was to heat frame and punch some dents to tubes.
After couple of trys engine did fit in to frame,allthough very tightly.The dents were quit deep,approx 15mm in seatpost tube and 10mm above the valve tin..
Off course there is better ways.I dont recommend mine under most circumstances.Frame was already modified.
Now it is almost stock again.I'm goin to put UL-stroker into it for next summer.

zippo

Re: Knuckle frame conversion

#3

Post by zippo » Sat Sep 11, 2004 8:33 am

well i cut the seat post jacked up the frame anp inserted a steel rod down the seat post hole welded it .i filled in the gap with weld bead.if i have to notch the seat post know it is solid steel.i jacked the top up about 1/2 inch or so. Thanks for your reply

black13
Posts: 10
Joined: Mon Aug 31, 2009 7:37 pm
Bikes: 1966 project \ 47 knuckle \ 66 bsa \ etc
Location: vancouver B.C.

Re: Knuckle frame conversion

#4

Post by black13 » Thu Sep 02, 2010 1:57 am

this makes me really sad !......

RUBONE
Moderator
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Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...

Re: Knuckle frame conversion

#5

Post by RUBONE » Thu Sep 02, 2010 2:27 am

Perhaps the most idiotic post I have seen in a long time. Should be on the JJ!
Robbie

black13
Posts: 10
Joined: Mon Aug 31, 2009 7:37 pm
Bikes: 1966 project \ 47 knuckle \ 66 bsa \ etc
Location: vancouver B.C.

Re: Knuckle frame conversion

#6

Post by black13 » Tue Sep 28, 2010 2:24 am

ahaha agreed!

Sir_Rat
Posts: 285
Joined: Sun Nov 01, 2009 10:10 am
Bikes: '37 UL, '79 Frankenstein, '88 Sporty
Location: Oahu Hawaii

Re: Knuckle frame conversion

#7

Post by Sir_Rat » Tue Sep 28, 2010 10:52 am

Sacrilege!!!!! :evil: God Will Punish You for That!!! Don't do it!!

Rather than risk the wrath of many.....Why don't you trade with me? I'll send you a brand new aftermarket frame in exchange for your beat-up worn out old knuckle frame.

Aloha...Mike

If its not too f'cked up already.

ironhead7777
Posts: 2
Joined: Sun Dec 19, 2010 7:18 am
Bikes: ironhead
knuckle
Location: mexico

Re: Knuckle frame conversion

#8

Post by ironhead7777 » Thu Jun 23, 2011 1:04 am

hi
do you know by chance , what do I have here? just bought it.

#1 is marked as 37UL and #2 as 48. are these knuckles? or flathead? or pan?

thanxs for watching
here is the pic https://skydrive.live.com/?wa=wsignin1. ... 51C8C4!287" onclick="window.open(this.href);return false;

RUBONE
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Posts: 4801
Joined: Sat Nov 15, 2008 4:09 am
Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...

Re: Knuckle frame conversion

#9

Post by RUBONE » Thu Jun 23, 2011 2:34 am

Number 1 and 2 are both Big Twin Flatheads, the engine number will tell you more. UH or ULH is 80CI, U or UL is 74 CI.
Picture number 3 is H-D Big Twin Transmission.
Picture 4 is Indian.
Robbie

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