They need a polish but look in good condition. Come with bearings in OK condition too. They came with my track bike but if I swap forks I'd go for a period 'blade front end so no use to me.
SP1 bottom yolk and stem
Moderator: VTRDark
-
freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
SP1 bottom yolk and stem
Pretty sure it's SP1. Can't find any sold recently on fleabay so no clue of price. Pics can follow, just gauging if anyone's interested?
They need a polish but look in good condition. Come with bearings in OK condition too. They came with my track bike but if I swap forks I'd go for a period 'blade front end so no use to me.
They need a polish but look in good condition. Come with bearings in OK condition too. They came with my track bike but if I swap forks I'd go for a period 'blade front end so no use to me.
Last edited by freeridenick on Wed Dec 21, 2016 12:43 pm, edited 1 time in total.
Re: SP1 bottom yolk and stem
You haven't found one sold in a while because they are getting really hard to find.
I'm almost tempered to make an offer just to have a spare around as they are a must to get proper chassis geometry with a RC51 front end.
If it is a SP1 lower (The SP2 lower will not work) and if it is straight and true, it is actually worth a bit now days.
Just wanted to let you know what you have
I'm almost tempered to make an offer just to have a spare around as they are a must to get proper chassis geometry with a RC51 front end.
If it is a SP1 lower (The SP2 lower will not work) and if it is straight and true, it is actually worth a bit now days.
Just wanted to let you know what you have
Loud pipes don't save lives, knowing how to ride your bike will save your life.
-
freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
Re: SP1 bottom yolk and stem
OK, wow. Thanks for that. I'll dig it out tomorrow and make sure it is an SP1. Is it a straight fit to the 'storm then?8541Hawk wrote:You haven't found one sold in a while because they are getting really hard to find.
I'm almost tempered to make an offer just to have a spare around as they are a must to get proper chassis geometry with a RC51 front end.
If it is a SP1 lower (The SP2 lower will not work) and if it is straight and true, it is actually worth a bit now days.
Just wanted to let you know what you have
Re: SP1 bottom yolk and stem
Yes, that is why it is sought after. It is a direct bolt in and even uses the same bearings,
The SP2 stem uses a larger upper bearing and can't be used in a VTR frame.
The SP2 stem uses a larger upper bearing and can't be used in a VTR frame.
Loud pipes don't save lives, knowing how to ride your bike will save your life.
-
freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
Re: SP1 bottom yolk and stem
Dug them out this morning and found they are complete. There's a bit of furring on the inside of the lower clamps but other than that they're as I remembered. I'm not sure now, having hunted around for images of SP1 and SP2 yolks, which they are. The tapered stem is confusing me. The 'storm stem doesn't seem to have one but the bearings look about right.
I've been chewing over turning my bike into a bit of a Mori replica, hence the 'blade forks idea, but with Fabiostar picking up his new toy there are a few of those around. And mine would be a charlatan so maybe a different special could be born.
I'll leave this up though and if anyone's interested PM me. I'd consider a swap too.
I've been chewing over turning my bike into a bit of a Mori replica, hence the 'blade forks idea, but with Fabiostar picking up his new toy there are a few of those around. And mine would be a charlatan so maybe a different special could be born.
I'll leave this up though and if anyone's interested PM me. I'd consider a swap too.
Re: SP1 bottom yolk and stem
If the stem steps down it should be a SP1, the SP2 has more of a straight stem for the larger upper bearing.
So just compare the top of the stem with the one on your VTR where it comes through the bolt on the upper triple and if they are the same size, its a SP1.
The difference can't be missed when side by side.
While I did say this clam is a "drop in" it does require a little bit of mod'ing to work.
First you need to trim a bit off the inner fairing bits, easy to do with a pair of aviation snips and is unnoticeable unless you're under the bike.
Then you need to come up with a plan for steering stops, couple of ways to do this depending on your resources.
In return you get a clamp that engages higher on the fork. Depending on the fork, the places where they thin down, to save weight, are in different locations.
With RC51 forks, if you run a 954 lower, which does actually go in cleaner for a fork swap, the lowest you can run the forks is equivalent to having the stock forks pulled up 10mm in the triples.
So there are swaps where you need the flat lower.
Sorry to get so long winded....lol
Back to your clamp, at least here in the states all SP parts are getting rare, front end parts are really rare as most of them got stuffed into a ditch at one point or another......
Back when I installed the SP2 front end on my bike, which was around 10yrs ago, it took me 6 months to find a SP1 lower. Even then I only found one because I was on a club racing site and found an old spare someone had in their parts pile.
Another good example is the front wheel..... I could get between $400-$500 US for my front wheel and have it sold within a week
There is one other option, if you need a SP1 lower, but you better have deep pockets. You can still get the triples from Attack Performance but they run $1500 US which is a bit steep for me.
With all that, unless you need the cash, if you plan on building a VTR I would hold on to the triple until you source whatever front end you will run.
At that point sell it if you don't need it. Otherwise you might have a tough time finding another one.
So just compare the top of the stem with the one on your VTR where it comes through the bolt on the upper triple and if they are the same size, its a SP1.
The difference can't be missed when side by side.
While I did say this clam is a "drop in" it does require a little bit of mod'ing to work.
First you need to trim a bit off the inner fairing bits, easy to do with a pair of aviation snips and is unnoticeable unless you're under the bike.
Then you need to come up with a plan for steering stops, couple of ways to do this depending on your resources.
In return you get a clamp that engages higher on the fork. Depending on the fork, the places where they thin down, to save weight, are in different locations.
With RC51 forks, if you run a 954 lower, which does actually go in cleaner for a fork swap, the lowest you can run the forks is equivalent to having the stock forks pulled up 10mm in the triples.
So there are swaps where you need the flat lower.
Sorry to get so long winded....lol
Back to your clamp, at least here in the states all SP parts are getting rare, front end parts are really rare as most of them got stuffed into a ditch at one point or another......
Back when I installed the SP2 front end on my bike, which was around 10yrs ago, it took me 6 months to find a SP1 lower. Even then I only found one because I was on a club racing site and found an old spare someone had in their parts pile.
Another good example is the front wheel..... I could get between $400-$500 US for my front wheel and have it sold within a week
There is one other option, if you need a SP1 lower, but you better have deep pockets. You can still get the triples from Attack Performance but they run $1500 US which is a bit steep for me.
With all that, unless you need the cash, if you plan on building a VTR I would hold on to the triple until you source whatever front end you will run.
At that point sell it if you don't need it. Otherwise you might have a tough time finding another one.
Loud pipes don't save lives, knowing how to ride your bike will save your life.
Re: SP1 bottom yolk and stem
Just saw the pics..... thats a 954 type clamp....so never mind 
Loud pipes don't save lives, knowing how to ride your bike will save your life.