Characteristics created by Incorrectly adjusted ISO (Too tight & Too loose)

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MexicoMike said:
I thought the whole point of PTFE in this application is that it never requires lubricant
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Its does not need lubricant but using lubricant will further reduce the friction and extend the life, Glacier DU bushes that are PTFE lined will have double the service life if lubricated over being used dry.
 
MexicoMike said:
Were the original OEM spacers PTFE? I have no idea.
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They started life as plain nylon but before production ended they went to PTFE with recommendation that they be used retrospectively as replacements for worn nylon washers.
 
Torontonian said:
My bike seems happiest at .008 clearance to the front and rear isolastics.
Mind you the PTFE washers , they need to be periodically greased , which is often neglected , then remember that this measurement is TOTAL clearance , not measured per each side. The way to achieve this for me is to put the machine on it's sidestand , not center stand , slacken off the 2 main bolts , push the motor/gearbox over to the left side by boot , wooden lever stick or whatever works to achieve zero clearance on the left , then measure and adjust the right side with shims as per needed. MK 111 vernier system is a different cat .
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Tell me more about greasing PTFE. This is a very slippery material (Teflon) already.
 
illf8ed said:
Tell me more about greasing PTFE. This is a very slippery material (Teflon) already.
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I use dielectric grease or even Silicone spray from a spray can. Both work well. The spray is a heck of a lot easier . If choosing the grease I just smear my feeler gauge blade with it to get it in deep and next to and on the shuffling bronze impregnated PTFE surfaces. Both sides of each washer's surfaces. 4 washers = 8 surfaces that need some lubrication. Once a year seems to work well.
 
The dry film PTFE spray goes in like WD40 when applying it. Really easy to squirt at the iso’s in situ and being very ‘searching’ it gets in there nicely. Then as it dries it adheres to the surfaces as a dry film.
 
Fullauto said:
With the CNW/Jim Comstock head steady I backed off the vernier adjustments until it was smooth at all revs. This head steady maintains the alignment, hence, no hinge in the middle and makes it a delight to ride.
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With your good words about the CNW head steady, I thought I would look into getting one. I can't seem to find one in Matts catalogue. Have they been discontinued or is Jim no longer making them?
 
I noticed with the RGM Vernier Isolastic discs there is a more slick side so put that to the inside.
 
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i went for adj. iso on rear set .010 and dave taylor heady steady am very happy with handling and vibes
 
Torontonian said:
Yes DT headsteady is wierd but transforms the bike. Needs periodic lubing ( every time the tank is off . ).
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I have the standard mk3 version and it's lovely and smooth above 2500rpm. I wonder if it's like tyres, the new set up is always better than the old worn out ones?
 
Id found below 21/2 thou.thevibes started totake the chassiswith the egine.
But set at two,theyed clear in a few trips (fangs actually.Wasnt slow ).

The rear Iso setequal shims Ea.side.
The front measured ,bike on a beercrate . Wrestled / levered & checked Ea.Side . But only a tho. or so variation,in 'sit '.

Shimfront to neutral/-equal clearance Ea.Side ,

When clearace got to 5 1/2 ,withKR 76 front & K81 Rear, it'd get a trace of weave then .
Roadrunners wernt as demanding.But 3 to4 thou. was good .

This is fornigardly sportriding,tend to drift rather thanslide the rear .
Tho a 4.00 - 19 K 70 on the rear with a 23 T spocket was intresting , if more upright .
 
SteveA said:
So, I idly followed the link!

I can only guess that HNW has some in stock and that indeed Jim is not manufacturing at the moment!

Butt then I asked myself, who fits a castellated nut with the castellations facing toward a spring washer?, and why?
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Those crazy Dutch guys going to the cafe for lunch ;)
 
Yes, head steady helps a lot. With respect to handling, pinch bolts on the swingarm pin are another revelation, At least for the earlier bikes that lack the pinch bolts
 
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