Hard shifting when warm - Page 5 - Honda Rebel Forum
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post #41 of 55 Old 07-22-2019, 07:55 AM
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I'm still struggling to understand why yours shifts fine when cold and gets harder with the engine warm. The only logical explanation for me is something internal with the transmission. Possibly something is bent, broken, or cracked and heat exacerbates it.

In regards to external adjustments and the diagram, on my shifter, the dots are in the 10-11 o'clock position instead of the illustration's 1 o'clock, and the arm is around 6:30. I believe the diagram is for illustrative purposes only.

Keepin' all the left over parts. Gonna use 'em to build another bike!

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post #42 of 55 Old 07-22-2019, 03:04 PM
 
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So heres my thinking am I wrong or nuts? Bike has 10-40 per the manual if I change it again and put some say 10-30 will that have the film strength to protect the engine and trans while being thinner and allowing it to shift smoothly? I'm thinking this based on the article about oil saying dino oil is good to about 250 degrees and synthetic to about 300 I'd I'm getting 160 on the crank case, granted that's the outside not the actual oil temp, I've got a lot more heat the oil can suck up, and the fact that a manual trans in a car if you use the wrong weight they get hard or impossible to shift. I'm probably 110% wrong that's why I'm asking here before intentionally dumping the wrong oil In it.

Other question is as white/chalky the plugs were its VERY lean, I'll take a picture when I adjust the linkage when I get off work, could that be over heating the oil but the crank case is in open air so the surface is appearing acceptable?

Finding neutral was the whole reason my mom didnt want to ride the bike and gave it to my girlfriend, well when I'm playing on it I'm realizing it wasnt my mom it's something with the bike, which just reminded me the bike cold shifts so smooth it's amazing without the clutch shifts are no problem smoth and quiet, after around a mile or two the shifts get clunky like a harley, then they start getting hard.

Frustrating as hell but thank god it's a toy not my primary method of transportation

Thank you

Michael

06 rebel 250 100% stock
82 vespa grande
72 honda ct90
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post #43 of 55 Old 07-22-2019, 03:37 PM
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You could change the oil, but I doubt that is going to do much since many here use 10w-40, 15W-40 and XXW-50 with no shifting problems. Your mention of clutchless shifts being smooth would point to the clutch, which is a relatively easy repair. That would be the first thing I'd check if you get into disassembly. Can you shift without the clutch once the engine warms? If you haven't tried it, give it a shot. If it does it without too much complaint, there's your problem.

As those who change their own oil know, it's scalding hot if drained right after a ride. So a reading of 160 on the crankcase doesn't seem excessive. I just don't see your oil being the culprit, and doubt the lean condition is causing it.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
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post #44 of 55 Old 07-22-2019, 05:05 PM
 
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No once it warms up you just cant shift it with or without the clutch, but that just made me think I'll have to check when I get home I think hot it does shift a little easier with the engine off but still very hard which could be a clutch issue still right?

06 rebel 250 100% stock
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72 honda ct90
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post #45 of 55 Old 07-22-2019, 05:15 PM
 
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My thinking is the odds of it being the oil weight are maybe 10-20%. If this had happened immediately after switching from 10-30 to 10-40, it would seem much more likely. However you seem to be describibg a chronic problem that your mother had for a while.

But my vote is still to try switching to 10-30 oil. It's a <$10, 20-minute expense. Worst case is you confirm the shifting problem while hot has nothing to do with oil weight, and you still have nice clean fresh oil.

And using 10-30 is not "intentionally dumping the wrong oil in it." 10-30 is one of several recommended oil weights for the Rebel (it's the ONLY oil weight that my 2016 owners manual specifies.)

Let us know what you learn.

.

2016 Rebel 250 - - Black
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post #46 of 55 Old 07-22-2019, 08:22 PM
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You can change the oil, but I doubt it will change anything. Might want to drain it into a clean container so it can be used again. IMO, it has to be the clutch or possibly the transmission. It's a shame this issue wasn't taken to Honda while under warranty so they would have to fix it. It's beginning to look like improper assembly or defective parts. Might want to read up on clutch rebuild 'cause it looks like that's where you are headed. Note the position of the judder spring when disassembling the clutch, and be sure it goes back in with the proper side facing the plates.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
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post #47 of 55 Old 08-14-2019, 11:30 PM
 
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So an update, today I adjusted both linkages so they are parallel dots lined up which when I rolled the bike to sunlight I didnt have it lined up. This put it at 6 o'clock. I started adjusting the clutch and ended up with it adjusted where I have about an 1 1/4 inch free play in the lever and probably close to 1/4 of play on the cable sheath to lever. You were 100% right on the clutch adjustment I just had to adjust it with far more freeplay then I thought

06 rebel 250 100% stock
82 vespa grande
72 honda ct90
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post #48 of 55 Old 08-19-2019, 08:51 AM
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Specs call for no more than 3/4" of freeplay at the end of the clutch lever.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
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post #49 of 55 Old 08-24-2019, 04:00 PM
 
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Yea I have the owners manual and a service manual, at 3/4 of an Inch of play like they say hot it wont disengage, with slightly over 1 1/4 the clutch disengages now and it does it all in the first pro ably 1/2 inch if lever travel after the cable is tensioned. Does that say anything to you maybe the clutch is bad?



Sorry I take so long to reply it's a bit to warm for my liking to ride a motor cycle here in southern California

06 rebel 250 100% stock
82 vespa grande
72 honda ct90
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post #50 of 55 Old 08-24-2019, 04:20 PM
 
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Did you ever try changing to a 10-30 oil?

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