judder - help

[sv1000spilot]

Have a strange judder, feels like from the rear once i get to about 20mph.

Feels bit like the wheels aren't balanced

Goes away as soon as i lift off the accelerator, also seems to lessen under hard acceleration.

Not gear dependant as have manually shifted through the box.

Have changed the prop, so reasonably sure not UJ's

Any ideas???

[BioHazard]

Have a strange judder, feels like from the rear once i get to about 20mph.

Feels bit like the wheels aren't balanced

Goes away as soon as i lift off the accelerator, also seems to lessen under hard acceleration.

Not gear dependant as have manually shifted through the box.

Have changed the prop, so reasonably sure not UJ's

Any ideas???

if the rear i would still check the UJ's

[sv1000spilot]

if the rear i would still check the UJ's

Have checked them, no play in UJ's , next guess

[BioHazard]

When did you change the prop . Have you missaligned the yolks , as mudsurfer did a few years back

[sv1000spilot]

When did you change the prop . Have you missaligned the yolks , as mudsurfer did a few years back

Will have a look in the morning when light.

[sv1000spilot]

Update

Have checked them, no play in UJ's , next guess

When did you change the prop . Have you missaligned the yolks , as mudsurfer did a few years back

Yolks were aligned fine.

Checked UJ's no play, BUT with prop shaft back off discovered one of UJ's partially seized. My fault for not checking full range of movement before fitting.

Now have front wheel drive surf, until I get to SUPERSURF on tuesday to pick up replacement.

[BioHazard]

Good problem found