For anyone with a passion of 2 stroke bikes

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26/04/2006 at 11:51
Check out this Flying Scott :smoke:

My bikes
G
26/04/2006 at 12:36
Rich_H wrote
Check out this Flying Scott :smoke:


excellent...

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Do you know anyone throwing out a plotter / projector.. any kit really that could be used in making large scale prints. I dont have money but would be willing to work / trade. Give us a PM if you know anything. Cheers. G
26/04/2006 at 21:43

d

Edited: 16/03/2008 at 17:59
27/04/2006 at 10:54
Very interesting thread !

Just to let you know that many of these strokers do still take to the tarmac in the uk

Thanks to rd/nsr/kr1sforums for making it a day to remember
img86.imageshack.us/my.php?image=stroker36xo.jpg
27/04/2006 at 18:04

d

Edited: 16/03/2008 at 17:59
28/04/2006 at 22:46
demographic wrote
Alright then if we are on the subject of TZs what about the one that Roberts rode on the flat tracks.

This to me really about as good as it gets.




wow. i really want a go of that. :smoke:

it's people like you that make people like me need medication!
28/04/2006 at 22:47
Rich_H wrote
Check out this Flying Scott :smoke:



:smoke: nice one mate.

that is awesome! :smoke:

it's people like you that make people like me need medication!
29/04/2006 at 07:24
tz750 ..mmmmmm...best bike ever...just wish they had made it road legal
30/04/2006 at 17:25

d

Edited: 16/03/2008 at 18:00
30/04/2006 at 21:04
EddieJ wrote
Okay here goes for a technical question

Both of my TZ250's are only a year apart, yet someone has fitted a later rear caliper which runs under the rear spindle, rather than the correct for year over the rear spindle. So the question is this: Why did Yamaha see fit to change the design? I had thought that it was to make wheel change and pad change easier, but it seems to make no difference. It is also heavier being underlung as the bike is fitted with a torque rod. I have also yet to see a straight torque arm as they always seem to get bent in the event of an off..

The library photos below show what I mean..






This happened on the MX bikes of the time as well, and the reason ,as i understood it , was to allow the suspension to move more freely under braking , which certainly helped the MX bikes of the time that had rear drums . I think that it stopped the braking resistance force being applied to the swingarm , and transferred it to the rear of the frame. I know it made the bike more controllable (with a drum) on braking bumps , but now all bikes have reverted to the slot & peg setup on the swing arm. Maybe it was just the fashion of the time.
30/04/2006 at 21:34

d

Edited: 16/03/2008 at 18:00
Ric
01/05/2006 at 10:07
andy hook wrote
Very interesting thread !

Just to let you know that many of these strokers do still take to the tarmac in the uk

Thanks to rd/nsr/kr1sforums for making it a day to remember
img86.imageshack.us/my.php?image=stroker36xo.jpg
Andy, you the same Andy Hook that had his lovely RD special blown up by C&MM (sorry to remind you about it...)?


Team RNR

Valves are things to hold air in tyres!
01/05/2006 at 15:52
This used to be soooooo noisy

I see dead people /www.wtfwt.co.uk
01/05/2006 at 23:28
All with the cagivas for me....





Sex weeeeeeee
02/05/2006 at 15:18
Kev_YZF wrote
All with the cagivas for me....





Sex weeeeeeee


Thats a lovely looking bike.
02/05/2006 at 21:25

d

Edited: 16/03/2008 at 18:00
03/05/2006 at 17:50

d

Edited: 16/03/2008 at 18:14
04/05/2006 at 13:31
I've allways wondered what happened to my TZ250B and if it's still being raced.
I stamped my own engine and frame number on it 28*****IW so if anyone know's it's where abouts, let me know.
04/05/2006 at 14:56
EddieJ wrote
Thinking about it further, with the set up running above, there is an degree of free movement at the swingarm slotted end to allow for adjustment of the chain tension and wheel travel. I pressume that with this set up there must be a very very slight amount of time delay before the brake is 100% effective. With the underslung torque arm position, there is no slack and it is a direct pull.
If this was the reason, then I doubt that anyone but a top level GP rider of the day would ever notice the change.
Interesting that it made such a big difference on the MX bikes that had drum brakes.



After having a think, i remember it a bit more detail on this.The important point is that drum rear brakes were rod operated , not hydraulic.

Because having the torque arm attached to the frame kept the backing plate in the same place realative to the brake pivot (rotationally , not heightwise) , the feel of the pedal would vary dependant on how much travel was being used . This meant that when you braked hard and the front dived , the rear would be lighter and the swingarm would be 'below centre' relative to the straight line between the swingarm pivot and the front sprocket, which is the point at which the the wheel is furthest away from the front sprocket, straight line wise. Braking with the rear like this meant that the suppleness at the beginning of the stroke was being acted on by the braking force , which meant the rear end would hop all over the place going into corners .
By allowing the backing plate to move relative to the swingarm , the brake force didn't act through the suspension in the same way .

The only thing i can honestly say that demonstrates this well is that bastion of motorcycle design, the C90. If you ever rode one , and pulled on the front brake , the front would actually rise. The effect there is more severe because the length of the front swingarm is very short , but the mechanical principles are the same.
06/05/2006 at 16:01
just picked this up.




Needs de-stickering and repainting in my own colours like the ZXR was


Another ZXR400 racebike
2007 ZX6R Racebike
2004 SV650s K4 Roadbike
EX-Gilera 180 Runner 2T Wheelie Monster
Ex-CBR600rr racer
Ex-Honda RS125 racer
EX-Polini GP3 proddy racer
EX-Polini XP4 Motard racer
EX-Polini 910 Carena racer
Moped mayhem endurance racer - no more
EX-POLINI SCOOTERINO RACER
EX-ZXR400 National Racer
EX-Steel Frame CBR600 Racer
EX-CBR600 KRC Endurance racer
EX-1/5th scale RC bike racer
And Ex-R1 Formula1 sidecar passenger/crash test dummy
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