gear grinding while shifting

Hi all,
I need some of your advise with my yamaha XJ700.
Its gear shifting has been getting increasingly rough. The problem is that
it shifting from N->1->2 is rough, sometimes with gears slapping inside as i
shift carefully. Very nerve
racking. From 3->4->5, the gear grinding is rarely a problem.

I was advised me to try change oil and remove excess slack in the
clutch lever. I did both of the above and while the gear friction seems to
be a lot reduced, the frequency of occurence has not decreased any. It just
seems less grindy. However, i noticed that shifting 5->-4->3->2->N->1 is now
silk smooth.

On the whole, one in 3 or 4 shifts from 1st gear to 2nd is not smooth.
I also notice a solid THUNK when shifting from N->1. it might be normal.

Any suggestions on what i should do to investigate? Also, the clutch line
has always been pretty tight, so i am wondering if i should begin with
replacing it, and then proceed downwards to the clutch housing etc?

Thanks all,
sri

 

Sounds like the clutch is dragging, not releasing completly during the
shift.
B

 

Sounds like the clutch is dragging, not releasing completly during the

Would adjusting the length of clutch cable help any in this situation?

 

Only if there is loose play at the clutch lever, otherwize you may need to
inspect and clean the clutch plates.
B

 

Adjusting clutch is more than just cable slack. There's an actual
lifter adjuster on the motor. 1) Put all slack possible into
cable. 2) Use lifter adjuster to take up as much of that as you
can, W/O binding the lifter solid against the pressure plate;
usually a 1/4 or 1/2 turn slack is about right. 3) Take up remaining
slack in cable, leaving about 1/4" free motion at lever.


Regards, Hoyt McKagen

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No.

 

<SNIP>
I tend to believe that if you are having problems around the 2nd gear it
is possibly a bent shifter fork in the transmission. Open the top of
your transmission to gain access to your fork shifters. Pull them out
and measure them on a flat surface to see if they are perfectly straight
or if you have bent one by down shifting with excessive RPMs missing 2nd
gear. This is a very common problem. It make shifting in and out of
2nd very difficult. Other grinding problem would be the dogs on the
gears not completely separating, why? The shifter forks are bent and
don't fully slide the gear over, or there is a worn track on the shifter
drum which keeps the shifter forks from sliding properly. Just a few
other things to check.
Bent shift fork shafts, Worn shift fork engagement pins, worn or damaged
indexer.

Page
NTXNS FXDWG '01

Reference can be found at
Library of Congress Cataloging in Publication Data
Johns, Bruce A.
Motorcycles Fundamentals, Service, Repair by
Bruce A Johns , David D. Edmundson, Robert Scharff.
p. cm.
ISBN 1-56637-479-0
1. Motorcycles--Maintenance and repair. I. Edmunson, David D.
II. Scharff, Robert. III. Title
TL444.J63 1999
629.28'775-dc21 98-23297
pg. 470-477 CIP
The Goodheart-Wilcox Company, INC. Publisher
Tinley Park, Illinois

 

Thanks Page. that's a lot of diagnostics to do, but i am much more informed
now. I'll pick up the book too. its available at th local library.
sri