2356
KTM / Re: kick starter 495
« on: August 28, 2007, 10:01:20 PM »
Tony,
Is it an '83, if so I have a test already scaned and waiting delivery.
Is it an '83, if so I have a test already scaned and waiting delivery.
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2357
System problems? / Re: Where are the pictures?
« on: August 25, 2007, 10:47:09 PM »
What's really weird is I posted a pic and it worked fine and about two days later it had dissapeared?
2358
Husqvarna / fork leg size
« on: August 23, 2007, 07:03:00 PM »
Can anyone tell me the size of '85/'86 Husky fork leg Dia.
2359
Maico / Re: swaping cylinders
« on: August 18, 2007, 12:44:31 PM »
I realise it's not really an issue at club level, I guess what I am tyring to find out is if I was to venture to Tassie for the titles, would a reed valve "Pre 85 " barrell be allowed in the evo class?
2360
Maico / Re: swaping cylinders
« on: August 17, 2007, 06:42:58 AM »
Oh! When did Maico go to reed valve?
2361
Maico / Re: swaping cylinders
« on: August 16, 2007, 09:22:22 PM »
Even though it's a motor derived from a pre '85 bike?
2362
Maico / swaping cylinders
« on: August 16, 2007, 07:57:46 PM »
Is it possible to fit a cylinder from an '81 490 on to an '82 490 motor ?
And what other differences are there between the two....anything that would cause scruteneering issues at a title event such as tassie?
And what other differences are there between the two....anything that would cause scruteneering issues at a title event such as tassie?
2363
Yamaha / Re: monoshock upgrades
« on: August 15, 2007, 02:45:40 PM »
Tony,
If you are running a it465 h spring on a yz j shock, then you will be getting a real frankenstien ride.
I would recommend going back to the IT shock and getting the spring rate right first, then look at valving.
You can waste a lot of time and money on the J shock before you can get it right and then it still not be anywhere near what our old bodies demand. The design is nearly 35 years old after all.
I use a guy at capalaba called db race suspension, I have never had any probs with his work, and unlike rad he does set up as well.
If you are running a it465 h spring on a yz j shock, then you will be getting a real frankenstien ride.
I would recommend going back to the IT shock and getting the spring rate right first, then look at valving.
You can waste a lot of time and money on the J shock before you can get it right and then it still not be anywhere near what our old bodies demand. The design is nearly 35 years old after all.
I use a guy at capalaba called db race suspension, I have never had any probs with his work, and unlike rad he does set up as well.
2364
Yamaha / Re: monoshock upgrades
« on: August 14, 2007, 09:27:19 PM »
I actually settled on a "j" model shock as the best option, but I had a spacer inserted to reduce the travel as the rear end sat to high, giving me the impression that the rear was too stiff, when it was just transfering too much weight onto the forks, it really improvred the rear action, but it never turned the same after that. Mind you it is carrying an extra 20kgs in the form of a fourstroke motor so I couldn't vouch it's action in a yz/it.
2365
Yamaha / Re: monoshock upgrades
« on: August 14, 2007, 06:57:06 PM »
Tony,
Are you running the standard spring?
I have an yamaha monocross set up on my bike and have spent years and $$$$$ trying to get it right, even a high dollar white power shock didn't work.
Before running out and spending lots of money on shock components I suggest you get the spring rate right first ie the right spring to carry your 100plus kg frame.
Here is a simple test to see what you have, if it's standard then right away it will be way to soft.
Part 1
Put your bike on a center stand so both wheels are off the ground then measure from the center of your axle to your seat bolt on the frame, record this measurement.
Then get your gear on and hop on your bike (sorry forgot to mention you will need two or three people for this) sit or stand in your natural riding position,bounce up and down a few times then let the bike settle. and again get someone to measure from the axle to the seat bolt. (While your still on the bike)
Then deduct this measurement from the first measurement, it should be between 95 and 105 mm roughly. This will depend on weather you have had 1 lamington or 10, before starting.
If it is less than 95 mm then you need to reduce the spring preload, which is done by loosening the large nut at the top of the spring on the treaded section of the shock body, two threads equate to about 5mm of spring preload. If it's more than 105mm then increase the preload, by tightening the nut.
Once you get to the magic figure with then your RACE sag is set. Part one completed.
Part two.
Put your bike back on the center stand with both wheels off the ground, again get the measurement between the axle and the seat bolt, then take the bike off the stand, bounce the rear end a bit and then let it settle, again take the measurement, and deduct it from the first measurement, it should be between 15 and 20mm, either side of that your spring is either too soft or too hard. This is called you STATIC sag.
If it is less than 15mm then your spring is too SOFT, if it is more than 20mm then you spring is too HARD.
No that's not a missprint and I will explain it all in my next installment of " 7564 steps to monoshock enlightenment"
And if you change the shock spring always get fork springs to match ther is only one thing worse than badly sprung but balanced bike and that is a badly sprung UNbalanced bike.
I will be here till 5pm weekdays and 12noon on staurday.
Are you running the standard spring?
I have an yamaha monocross set up on my bike and have spent years and $$$$$ trying to get it right, even a high dollar white power shock didn't work.
Before running out and spending lots of money on shock components I suggest you get the spring rate right first ie the right spring to carry your 100plus kg frame.
Here is a simple test to see what you have, if it's standard then right away it will be way to soft.
Part 1
Put your bike on a center stand so both wheels are off the ground then measure from the center of your axle to your seat bolt on the frame, record this measurement.
Then get your gear on and hop on your bike (sorry forgot to mention you will need two or three people for this) sit or stand in your natural riding position,bounce up and down a few times then let the bike settle. and again get someone to measure from the axle to the seat bolt. (While your still on the bike)
Then deduct this measurement from the first measurement, it should be between 95 and 105 mm roughly. This will depend on weather you have had 1 lamington or 10, before starting.
If it is less than 95 mm then you need to reduce the spring preload, which is done by loosening the large nut at the top of the spring on the treaded section of the shock body, two threads equate to about 5mm of spring preload. If it's more than 105mm then increase the preload, by tightening the nut.
Once you get to the magic figure with then your RACE sag is set. Part one completed.
Part two.
Put your bike back on the center stand with both wheels off the ground, again get the measurement between the axle and the seat bolt, then take the bike off the stand, bounce the rear end a bit and then let it settle, again take the measurement, and deduct it from the first measurement, it should be between 15 and 20mm, either side of that your spring is either too soft or too hard. This is called you STATIC sag.
If it is less than 15mm then your spring is too SOFT, if it is more than 20mm then you spring is too HARD.
No that's not a missprint and I will explain it all in my next installment of " 7564 steps to monoshock enlightenment"
And if you change the shock spring always get fork springs to match ther is only one thing worse than badly sprung but balanced bike and that is a badly sprung UNbalanced bike.
I will be here till 5pm weekdays and 12noon on staurday.
2366
Kawasaki / Re: KLX's - a shared disease
« on: August 10, 2007, 02:18:50 PM »
Yuma,
I don't know about the red one, but I have an old Trail and Track article on the green one which was manufactured by Kawasaki Europe to race in the German isde back in the early '80's If I remember correctly they used a z400 motor in the klx frame to race in the open 4 stroke class.
FYI got to www.thumperpilot.com to get your fix on all things four stroke and special.
I don't know about the red one, but I have an old Trail and Track article on the green one which was manufactured by Kawasaki Europe to race in the German isde back in the early '80's If I remember correctly they used a z400 motor in the klx frame to race in the open 4 stroke class.
FYI got to www.thumperpilot.com to get your fix on all things four stroke and special.
2367
General Discussion / Re: how do i post a photo in this new forum ????
« on: August 02, 2007, 11:10:05 PM »
did it work.....yep!!!
[attachment deleted by admin]
[attachment deleted by admin]
2368
General Discussion / Re: how do i post a photo in this new forum ????
« on: August 02, 2007, 09:19:00 PM »
OK, so if it's too big how do you reduce it?
2369
Competition / Re: Tassie Nationals 2008
« on: July 30, 2007, 08:55:25 PM »
Is pre '85 in the gcr's 