For Kel: B Grades bucket build

[Henk]

Won the last B grade race on Saturday at Kaitoke on the 100, felt like a complete bastard so parked it in the van on Sunday.
Your target would be eight HP then?

[cotswold]

You can see from the photo that the shaft from the donor TS125 is longer and fatter than the GP125 one.
This is a pain in the butt as it necessitates some engineering, which means I can't do it myself. 2 methods have been suggested,
1) cut off both the shafts and join the gp one to the ts to the correct length by making a spigot and socket and welding.
2) have the TS one shortened and machined to match the spline on the GP.

I will let you know which method gets used.

[F5 Dave]

bioy I don't envy you on either of those paths. Machining hardened shafts will be a total bear, but welding that straight, I would doubt it, but no expert.

[quallman1234]

Righto, i've given up on the Aprilla RS50 frame, and gone for something normal.

Would you like the remains? Being, frame/swingarm/rear wheel (That could be quite handy actually)...
Ivan says he wants the rear assembly to put in his frame, to give away to someone. But i highly doubt someone wants his frame.

[cotswold]

Righto, i've given up on the Aprilla RS50 frame, and gone for something normal.

Would you like the remains? Being, frame/swingarm/rear wheel (That could be quite handy actually)...
Ivan says he wants the rear assembly to put in his frame, to give away to someone. But i highly doubt someone wants his frame.

yes please, pm sent

[koba]

Yeah, even if you recess it into the wheel 2mm & make a step in the original sprocket.

Look at JT website for large skinny sprockets. Mine is KX80 (420 thinned to 415) & have large inner, thus I can match any KX sprocket to my fitting with just 3 semicircles filed or bored in the right place.

This is a bit of a dredge but I'm now thinking of how to make all the RS shit fit.

Is this post referring to the 50 or the 100?

If it's about the 50, what are you using for the 100?

[F5 Dave]

erm on the 50, but I'll mod the 100 at some time. Just need to cut an old spkt or make a disc so it fits inside an easily bought sprocket like the KX. Then I fit 3 shouldered bolts with washers between them, like a semi floating disc rotor. Scotch lapping, or french polishing or summit like that.

[Henk]

I've got some impulse / GSXR250 sprocket carriers that I think take FXR sprockets that you could try and munter for an adapter plate if you want me to drag one to Roy's Hill for you.

[quallman1234]

I was looking through the JT sprockets book with all the dimensions etc on them (dont think they are on the JT site) the other day at TSS and i skipped over sereval RS looking sprockets.... Must investigate tomorrow.

[F5 Dave]

Andrew gave me an old (2005) book some years back. Hmm, JTR1780 36mm hole 56mm di for mounting holes. Seems a bit small, 420, teeth range erm 28?!? No other sizes. Or JTR255 another 42 same bolt holes, 29.2mm hole. teeth: 40, 42, 45.

Nah turn an old one down & match it to the inside of an available one.

[cotswold]

erm on the 50, but I'll mod the 100 at some time. Just need to cut an old spkt or make a disc so it fits inside an easily bought sprocket like the KX. Then I fit 3 shouldered bolts with washers between them, like a semi floating disc rotor. Scotch lapping, or french polishing or summit like that.

Photo's are better than 10 chars.... please

[F5 Dave]

yes they are but I'm at werk & the bike is in the shed.

imagine what a Disc rotor looks like when apart, heck I'll do it for you. Make the inner look like this & the outer (KX80 in my case) the opposite. Then use shanked bolts instead, I used 4, heck use disc bobbins, I don't care.



Please excuse my excessive use of the potty mouth H word.

[quallman1234]

yes they are but I'm at werk & the bike is in the shed.

imagine what a Disc rotor looks like when apart, heck I'll do it for you. Make the inner look like this & the outer (KX80 in my case) the opposite. Then use shanked bolts instead, I used 4, heck use disc bobbins, I don't care.



Please excuse my excessive use of the potty mouth H word.

So you just turn out the inside off the KX80 sprocket and the holes line up i gather?

I went to TSS and found 1 in the 2010 catalog. JTR216... 420 chain, 3 hole 72mm, but has a 50mm middle hole instead of 40mm. Its for a NSR50...
TSS Couldn't get them, but ill like abroad. Bert's doing a order of vortex ones, but 72NZD is a little pricey esp since i dont know what size i really want.
I have plently of old used ones from 35 - 40, which are fine for a bucket. But too long for a FXR

http://www.jtsprockets.com/catalogue/sprocket/JTR216
36, 37, 40, 41, 42, 43, 45, 47

47 tooth... http://www.ebay.com/itm/Kettensatz-H...item231fef6389
with a free chain and useless front sprocket (well it might fit an mb100)

Search NSR50 rear sprocket...
http://www.ebay.com/sch/i.html?_odkw...ocket&_sacat=0

[husaberg]

You can see from the photo that the shaft from the donor TS125 is longer and fatter than the GP125 one.
This is a pain in the butt as it necessitates some engineering, which means I can't do it myself. 2 methods have been suggested,
1) cut off both the shafts and join the gp one to the ts to the correct length by making a spigot and socket and welding.
2) have the TS one shortened and machined to match the spline on the GP.

I will let you know which method gets used.

Why does the spine have to be matched to the GP one?

[cotswold]

Why does the spine have to be matched to the GP one?

pretty sure the clutch basket sits on that bit, but stand to be corrected. We are having a look at spark erosion at the moment.