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  #11  
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There are two basic versions of the triple trees.

The first version for -51 and 52 K models provided less trail and the tubes are not parallel to the stem. The casting number for the tree itself is a -52 part. The later version is a -52A part. You cannot mix and match these parts.
There are a number of top clamps both steel and alloy. Visual inspection is the only way I know of to tell them apart.
There are three versions of the steel top clamp. The original -51 part was modified by making the boss larger and drilling the stem hole farther back. The next version was a new casting.
The earlier style was also used on the KR's and XLR's but with different top clamps.
The alloy one came in in 62 (from memory) and was used basically up until the 73 forks took over. (Showa ? I forget)
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Quote:
Originally Posted by GA_Ironhead View Post
I've got a front end of unknown vintage, because I've never really tried very hard to figure out what it is exactly. 33.4 mm tubes, full drum bkake, later lower legs.

I've got the same lower tree, same casting number. I don't think they ever had the tabs on the front, and the rear is undrilled.
this sounds like '71-72 to me.
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Quote:
Originally Posted by Ferrous Head View Post
The alloy one came in in 62 (from memory) and was used basically up until the 73 forks took over. (Showa ? I forget)
i agree but remember '73 35mm started with kayaba.
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Ah, yes. Kayaba.

I remember at the time some people were shocked to find Japanese parts on their "All Meirkan" bikes.

Despite the fact they had been using Japanese parts for years before.
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Slide tube into the tree and see if it is parallel to the neck.

I'm sure you will find that they are not raked trees, to the best of my knowledge raked trees were not offered for the 35mm forks. Different 35mm trees were used on the big twins because of bearing size and neck length only.

35mm is disc brake territory, drum brake is 33.5mm

The pic you have hints of 33.5mm as it has a riser for 2 piece bars. That is not definitive as the riser unbolts.
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It doesn’t look raked to me.


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After going back around these, and another set on a different bike yesterday, I dont think they're raked. Ive not messed with these earlier sportsters, only stuff with disc brake front ends. Just learning some new stuff as I go along. Oh yea...anything I'm asking about with this front end is 33.4 drum brake stuff. Thanks for the replies
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The rake if any, can be measured with tubes put back on obviously.
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