Motorcycle won't shift gears

Question edited for clarity.
Question moved from Suzuki Cars to model category.

SUZUKI VL1500 SERVICE MANUAL Pdf Download

ManualsLib https://www.manualslib.com > ... > VL1500

View and Download Suzuki VL1500 service manual online. VL1500 motorcycle pdf manual download. Also for: Intruder 1500, Vl 1500.

• 
  

  Suzuki Intruder 1500 Manuals

  https://www.manualslib.com > ... > Motorcycle
  We have 2 Suzuki Intruder 1500 manuals available for free PDF download: Service Manual, Technische Tekeningen Manual. Suzuki Intruder 1500 Service Manual (410 ...

Suzuki Intruder LC 1500 (VL1500) (1998 - 2005) Clymer

Haynes Manuals https://haynes.com > en-us > intruder-lc-1500-vl1500
Need to service or repair your Suzuki Intruder LC 1500 (VL1500) 1998 - 2005? ... The original Haynes Repair Manual - Based on a complete strip down and ...
US$39.95

https://www.google.com/search?q=2001+suzuki+intruder+1500+starter+solenoid+wiring+diagram

More information please. What EXACTLY is it doing? Slack clutch lever? Stuck clutch lever? Crunching or grinding as you try to shift? Grabbing and stalling as it selects the gear?
Start at the clutch lever. Check it is pulling the cable then check at the transmission end that the cable is connected and moving with the lever. Next check the lever on the actual transmission. Does it seem too tight or too slack? These will give clues as to where the issue could be.
It's a 37 year old bike so is it the original Clutch? Even motorcycle clutches wear out.

can you get it out of gear?
can you change gear
does the clutch drag ( shifts are difficult )
the clutch plates are froze/ stuck together, remove clutch, check plates for rust clean soak in fresh oil replace any that are rusty..

it would turn into an overdrive gear--a whole new 5 sp box is probly the answer--theres more shifting in traffic--to me 4 is enough-thats all olschool bikes had---------youd have to git with a customizer-there found in drag mags or online

If the gears change hard you are probably not using the right kind of oil in your engine. Use only a JASO MA certified motorcycle oil. Full synthetic oils will help the motorcycle run cooler and shift easier. Suzuki sells a 15w-50 full synthetic oil that is reasonably priced. Also , do not tap the shifter with your foot when shifting. Place your toe , pressing gently against the pedal , and then shift.

i like the metzler 880 front and back.they are sticky and good for 12,000 miles

Up shifting CLUNK on a shaft drive motorcycle is caused by all the drive line slop. Don't tap the shifter with your foot when you shift. Try putting gentle pressure on the lever with your foot, then pull the clutch and shift the gear. This technique should eliminate the CLUNK.

This sounds like a bent shift fork. A bent shift fork will not let the slider gear(s) move properly.

shift fork in trans is not engaging need to let someone open trans and sovle the issue those trans are not hard to fix but if you dont know how the shift fork needs to be to fuction seek pro help