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Discussion Starter · #1 ·
Hello all,

This section doesn't say I can't post progress about a NON Honda bike and a few of you asked for updates so here goes.

As some of you know I scored a 71 Triumph Bonneville beginning of August:



A week ago I was puttering around on it and got the bike to fire. Everything sounds pretty good so the engine just needs some cleaning, tweaking and TLC in general. I knew nothing about Triumphs but have discovered that the 71-72 model year was/is the bastard child of the Bonnie lineup. There is a laundry list of things that were redesigned and in general took an evolutionary step backwards. Most of these items can be corrected with aftermarket items or just some good ole garage engineering.

Because the bike in my opinion is pretty rough, from the standpoint of molested / missing electrics, missing components and just not being that special as a restored bike I have decided to go the route of a hard tail bobber.

Tomorrow I pick this up:



It looks like its been stretched a few inches which is what I wanted and am getting it for a song, considering the price of a bolt on hard tail if I could even use it on the 71 frame. The 71 was the first Oil In Frame design, one of the problems it had was being big and ugly. The other which to me is of greater importance was a reduction of 2 pints of oil capacity which led to overheating in the summer.

I'm not sure of the year of this frame doesn't matter all unit frames will take all unit engines for the most part... you can't put an older engine into the 71-72 frame but the 63-70 frames do not mind at all.

I am going to split the cases and completely disassemble the engine due to large amounts of moisture in the trans case.



I need to replace the inner gearbox cover as well. Looking at the new kick start quadrant and the damaged pin that hold the kick start lever to said quadrant I'm going to say that as some point in time things didn't mesh up properly and the inner gearbox cover took the hit. I began to suspect something was amiss when it wouldn't kick the engine over except when you put just the right kind of pressure on it. The part incidentally was only used on 8000 70 models, all 71 and 72 4 speed models. While not unavailable they are in the minority of the parts out there.

So my concept for the bike is stock rake, custom oil tank... Oh I can't hold it in:



They are Aluminium and holds 2 qts... I'm planning on taking a fine cut off of both bottles and welding them together. The 70 oil tank held 8 pints which I believe is 4qts. With the external oil filter and oil cooler I should have more than enough room for a full 8 pint load with expansion room and what not. I'm planning to use the stock fuel tank, fork, wheels, brakes etc. I will probably go with something similar to a drag bar, but possibly a European style bar for comfort... time will tell. Eventually I'd like a magneto but they are rather pricey... so for now a small battery. Only a kick starter so no major draw for the battery to absorb.

That's it for now. I'll post some mock up pick hopefully by Monday. Feel free to ask questions, make comments. I love the bench racing.

Novafrk / Eric
 

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Eric, TWO questions..... (1) what thread (type, size,pitch) is in the "top" of the tank?
(2) Where can I get one?...... (What are they actually from?)... Steve
 

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Discussion Starter · #3 ·
I have no idea as to the thread size pitch. My plan was to use the fitting that comes on the bottle as the oil cap. The bottle contained 500ppm and 1000ppm anhydrous ammonia that is used to calibrate flow meters used in the Pharma industry. When they are empty they drill a hole in them and throw them away. I plan to intercept any and all bottles in the future. I do not know how the ammonia affects the metal. I'm going to guess it's non reactive.
 

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I was hoping it would be a standard (NPT) tapered pipe thread,and if they are pressurized, that would be likely....I don't suppose that eventually you might have an extra "extra"?..... I'd be HAPPY to dispose of one for you... ;) Steve
 

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Discussion Starter · #5 ·
Steve,

Of course! That's why I'm snagging every one I can get my hands on. I'll let you know when I get another one. I'm giving one to my dad, he's going to use it as a radiator overflow on his 41 chevy rat rod. I'll happily send one your way.

Eric
 

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Very cool project, if you're going to have a bobber it should be a Triumph. I love those oil in the frame models though, check out the Cycleworld website a do a search on "tribute Triumph".
 

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Cool! (and Thanks!).... I appreciate your generosity and consideration.... Steve
 

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Discussion Starter · #8 ·
Today has been a splendid day! I received the replacement Inner gearbox cover in the post (trying to get into the proper British mindset. LOL) I picked up the rigid frame today as well. Time to fire up the chop saw and the welder. Quite a few brackets and crap that were poorly welded on that I will not need. The frame is in good shape over all. I'll grind/cut off the things I do not want and will probably take it to the sandblasters for a quick strip. The frame appears to be stretched 4 inches which is exactly what I had in mind.

I'm off and running. I'll post some more pics when something interesting happens.

Eric
 

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Discussion Starter · #9 ·
Just a quick update. The Trumps on the back burner until I get the transmission shifting problems sorted out on my Tree Fiddy. That won't be till after the first of the year. For now I'm just reading / researching what I want to do and how best to do it. Happy Holiday's!

Novafrk / Eric
 

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Discussion Starter · #11 ·
JRK,

Did you take a thin slice off of each and weld them together? How did you do it. My thought is to have them vertical welded together or maybe weld a bung in the lower side of each and thread them together. With a large oil filter set up I'll have right at a gallon of oil capacity with these two bottles.

Novafrk / Eric
 

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no i ran two seperate bags... one on each swing arm... the pump was strong enough to push it.. conected them with 1in hose in 3 spots, had the entry point on the one and the exit point on the other
 

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Discussion Starter · #13 ·
I see. That might be the way to go... separate them to the outside of the plate behind the down tube... then I can hide my battery between the two of them until I can score a mag. Then I'll have somewhere to put stuff. Do you have any pics?

Eric
 

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British pints are 20 fluid oz not 16oz like US. (so we drink more, even if wee drink 'the same' :lol: )
I thought Triumph was 6 pint? (but I haven't done one since 1987)
PJ
 

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Discussion Starter · #15 ·
PJ,

I didn't realize the difference in volume thanks for throwing that out there. According to the Trump owners manual for the '71 the oil tank holds 4.8 us pints. 1971 is the year Triumph went to all SAE standard fasteners and what not. I'm glad cause the Wentworth (sp) tools are pretty pricey. I'd better get a set soon, as I plan to do another Triumph after this one. Got any other Triumph advice?

Novafrk / Eric
 

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Discussion Starter · #16 ·
By the way PJ,

You are correct for Triumph pre 71. When Triumph went to the OIF they lost almost two pints of oil capacity. I've read it led to them running much hotter than previous years with the higher oil capacity.

Novafrk / Eric
 

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JRK5892 said:
no man i hunted everywhere... here is the bike i based my build off of though... you can see the fire extinguisher oil bag on this guy real well he just did 1... i was poor and only had 2 small ones so i made that work:
the fella that built is the guy in the back round it was on the CBchopper site and i fell in love... he helped me out a bunch... i will try to get my buddy to try and get my lab top up so i can pull off some pics of my college builds... you can see the fire extinguiser under the seat... just found out that KONG (the owner and builder passed away... sad he build some KILLER BIKES)


 

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Discussion Starter · #19 ·
That is a great looking bike! I wish I had a bigger bottle now that I see that set up. I'm going for the two bottles vertical. Is that how you did yours? I forgot if you told me. My frame has a four inch stretch and the bottle is four inch od. It should fill that area nicely and make you wonder if its stretched or stock. Definitely get those pics I'd love to see them. Have you checked out my 73 CB350 I did? I think I did a recap post. Again I can't remember. The Honda was/is my first. I think it turned out pretty good.

Novafrk / Eric
 

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just make sure you inlet and outlet are the same height on both bottles then is is all about conecting hoses... use the same size hoses all around as well. should be plug and chug brother
 
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