motorbike bits heattube/headset/bearings... erm?

[knighty]

my electric pedal bike is dieing a slow death.. 40mph is killing it...

so I'm going to build myself a new frame, with front forks from a motocross bike, then a wie frame so I can fit all the batteries etc.. inside it, back wheel sticking further out at the back so I don't keep pulling wheelies and of course... pedals so it's still technically a pedal bike...

so I've nought the forks... now I need a headtube or whatever it's called to join the forks to the rest of the frame... but I have no idea what I need or where to look... everywhere I look has different names for the same stuff... I assumed it would be easy to find one...

the bar which goes inside the tube is 175mm long and 20mm wide

the tapered bearings are 12mm high and 30mm/40mm wide

I'd upload a photo but image shack isn't working properly right now... will try again later

can anyone point me in the right direction ?

[Jamesrl]

can anyone point me in the right direction ?

Yeh, there're called buses and taxis.

I think I've been nicked for speeding, 34ish in a 30 zone by one of those camera vans, that'll be my first traffic offence since 1963.

[Oilybloke]

my electric pedal bike is dieing a slow death.. 40mph is killing it...

so I'm going to build myself a new frame, with front forks from a motocross bike, then a wie frame so I can fit all the batteries etc.. inside it, back wheel sticking further out at the back so I don't keep pulling wheelies and of course... pedals so it's still technically a pedal bike...

so I've nought the forks... now I need a headtube or whatever it's called to join the forks to the rest of the frame... but I have no idea what I need or where to look... everywhere I look has different names for the same stuff... I assumed it would be easy to find one...

the bar which goes inside the tube is 175mm long and 20mm wide

the tapered bearings are 12mm high and 30mm/40mm wide

I'd upload a photo but image shack isn't working properly right now... will try again later

can anyone point me in the right direction ?

I think you should look at monkey bike, Honda Cub or Dax headstocks. Those measurements sound very similar to those models.

[knighty]

are they specially made/machined ?

I thought they would be just like a pedal bike, a bit of tube with a cup which fits in to take the bearing... but I've googled and can't find any :-(

the forks are from a 2010 YZ125... or that's what the seller said anyway!

[william crosby]

alan

has the seller not got the frame or there again the id numbers are on the head stock tube so probably been chopped up

[greasemonkey]

The bearings should be easy enough to come by. What you really need is the cups that slide into the head stock tube, unless you cut a headstock off a frame, but then youv'e already got the forks.

It might be worth having a browse through some bike building forums. I've seen a thread somewhere on someone changing the tube and cups, but that was a while ago.

[knighty]

I can't find bearing cups anywhere at all... I just assumed I was doing something daft or searching for the wrong thing

guess I could just get a thick tube and turn it out a bit so the bearing will drop into it.... just means I'll have to use a thick heavy tube when I'm trying to save weight  :-(

unless I turned my own cups... but not sure if it'll be worth all the extra work

[greasemonkey]

This is coppied from another forum, and it is quite outdated. They are Royal Enfield specialists, just google Hitchcocks. It could be worth giving them a call anyway. Best I can find at the mo.



As a starting point Hitchcocks have them


Part number 27249
Description STEERING STEM RACE, ENGLISH MADE
Price £ 8.80 NOT INCLUDING POSTAGE, PACKING or VAT

or

Part number 5735
Description STEERING STEM BALL RACE
Price £ 5.50 NOT INCLUDING POSTAGE, PACKING or VAT

plus

Part number 140189S
Description WASHER, STEERING STEM NUT, stainless
Price £ 2.50 NOT INCLUDING POSTAGE, PACKING or VAT
Larry
oldbmw
I luv the smell of Diesel...
 
Posts: 318
Joined: Sat Dec 09, 2006 9:24 pm
Location: near Poitiers west France

[knighty]

alan

has the seller not got the frame or there again the id numbers are on the head stock tube so probably been chopped up

nope, asked about the frame, he said he's already scraped it because it was damaged :-(

[knighty]

This is coppied from another forum, and it is quite outdated. They are Royal Enfield specialists, just google Hitchcocks. It could be worth giving them a call anyway. Best I can find at the mo.



As a starting point Hitchcocks have them


Part number 27249
Description STEERING STEM RACE, ENGLISH MADE
Price £ 8.80 NOT INCLUDING POSTAGE, PACKING or VAT

or

Part number 5735
Description STEERING STEM BALL RACE
Price £ 5.50 NOT INCLUDING POSTAGE, PACKING or VAT

plus

Part number 140189S
Description WASHER, STEERING STEM NUT, stainless
Price £ 2.50 NOT INCLUDING POSTAGE, PACKING or VAT
Larry
oldbmw
I luv the smell of Diesel...
 
Posts: 318
Joined: Sat Dec 09, 2006 9:24 pm
Location: near Poitiers west France

ahhhhhhh, searching for "stem race" is giving me loads of results... I'll search more when I get home... I steam cleaned down at work without putting my willies on... so had to hang out here till my legs dried to stop me from freezing on the way home!

thanks :-)

[greasemonkey]

Just ring any old supplier and ask them. The racers must be using them all the time, because they tend to go oblong. Here's one local to me. They might be able to tell you something.

http://www.etjames.com/

[greasemonkey]

This is coppied from another forum, and it is quite outdated. They are Royal Enfield specialists, just google Hitchcocks. It could be worth giving them a call anyway. Best I can find at the mo.



As a starting point Hitchcocks have them


Part number 27249
Description STEERING STEM RACE, ENGLISH MADE
Price £ 8.80 NOT INCLUDING POSTAGE, PACKING or VAT

or

Part number 5735
Description STEERING STEM BALL RACE
Price £ 5.50 NOT INCLUDING POSTAGE, PACKING or VAT

plus

Part number 140189S
Description WASHER, STEERING STEM NUT, stainless
Price £ 2.50 NOT INCLUDING POSTAGE, PACKING or VAT
Larry
oldbmw
I luv the smell of Diesel...
 
Posts: 318
Joined: Sat Dec 09, 2006 9:24 pm
Location: near Poitiers west France

ahhhhhhh, searching for "stem race" is giving me loads of results... I'll search more when I get home... I steam cleaned down at work without putting my willies on... so had to hang out here till my legs dried to stop me from freezing on the way home!

thanks :-)

If you need to steam clean your willie before you go home, you probably need a doctor........

[Glycer-rides]

Look like you need another frame to chop the head tube from....

http://www.ebay.co.uk/itm/Yz80-1983-Motocross-Vintage-Bike-Spares-Frame-Tank-Suspension-Rad-/181131747953?pt=UK_Motorcycle_Parts&hash=item2a2c4b2271

[knighty]

yeah... after googling more it looks like most motorbikes don't have cups for the bearings, the steering stem/tube is case the right size/shape to take the bearings as is


new plan, I've ordered some bearings, when they come I'll measure them, and then get at stem tube the same outer diameter as the outer diameter as the bearings

then get a couple of short bits to slide over those (tight) and then I'll slide those a little bit over the ends of the stem tube and weld them there.... which *should* end up perfect :-)

[petep900]

I think I've been nicked for speeding, 34ish in a 30 zone by one of those camera vans, that'll be my first traffic offence since 1963.

Just booked my latest 'Speed Awareness Course' today

36 in a 30 limit - on a dual carriageway

Pissed off but 75 notes and no points is OK even if it is half a day of crap.....