It was Mobil 1 motorcycle oil...maybe 10W40 something like that.  

On Monday, April 2, 2012 8:26:50 AM UTC-5, Kyle Munz wrote:
>
> Which oil did you use? If the clutch were slipping due to standard car oil 
> being used that would make shifting difficult.
>
> -Kyle 
>
>
> On Mon, Apr 2, 2012 at 8:07 AM, Bryan Gibson <[email protected]> wrote:
>
>> New rider with an '85 Nighthawk CB650SC.  I bought the bike in February 
>> from a guy that claims to have taken the bike out West just before he 
>> decided to sell it and after getting to take it out 3 times, the 
>> transmission seems to be shot.  He claimed to have done routine maintenance 
>> and was nice enough to change fluids except for oil.  So I went ahead and 
>> did so using recommended oil/filter.  The last day I rode it, I noticed 
>> that the bike started having trouble downshifting lower than 3rd and when I 
>> was lucky enough to get back down to 1st at a stop, I couldn't upshift past 
>> 3rd.  The clutch seemed loose, too.  I checked the brake fluid level and 
>> noticed on the clutch side that it was low and full of sediment.  I went 
>> ahead and changed the brake fluid (using recommended fluid) and the clutch 
>> was back to normal but I was unable to get any gears past 2nd (on center 
>> stand with the engine off).  After another 10-15 min of sitting, I now only 
>> have first and neutral.  I guess my first question (being a noob) should 
>> be, is it bad to shift gears without the engine running?  When I shift 
>> gears, the "good" gears click in, but once I try to go higher, it just 
>> makes a solid "clunk" like it does if you were to try to upshift past OD. 
>>  Does this sound like a shift fork, bad gear or does the entire tranny need 
>> replaced???  I'd appreciate any help as I'm itching to get back to riding. 
>>  (I ordered an OEM manual that isn't here yet and can work on simple things 
>> but I'm afraid rebuilding anything is above my pay grade.)  
>>
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>
>

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