WEIRD - Revving higher than normal when hard accelerating?? - Honda Rebel Forum
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post #1 of 23 Old 01-30-2019, 08:42 AM Thread Starter
 
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WEIRD - Revving higher than normal when hard accelerating??

I went out for a ride on my 2002 Honda Rebel 250 last night. I’m a new rider (MSF course two weeks ago) and have had this bike for a week as of today.

I was riding with a buddy, so naturally I started going harder on the throttle at times. Whenever I accelerated hard in like 3rd or 4th gear, the motorcycle rpm would go up, but then as it would come into the mid to high range (no tachometer so Idk what rpm number), it would rapidly go up/rev much higher and stay there, then match to that rpm.

Example: Let’s say I was revving at 2,500 Rpm in 3rd gear. I would accelerate pretty hard, and it would climb normally to 3,500 rpm and then really, really quickly climb to like 5,000 rpm and stay there for like a second, and then would go to 4,700 rpm and back to 5,000pm like normally and keep climbing until I upshift.

It reminded me when I would drive my manual car and accelerate hard, the tires would spin due to a lack of traction and the rpm would go high – then it would catch traction and go back to normal.

Except I was pretty certain that my motorcycle tire had traction the whole time. Weird, right?

What could this be?

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #2 of 23 Old 01-30-2019, 08:50 AM
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clutch plates slipping - did you change the oil recently with the wrong oil ?

maybe the clutch cable is too tight ?

1985 Rebel 250 ... 2005 Ruckus 50
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post #3 of 23 Old 01-30-2019, 09:00 AM Thread Starter
 
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I changed the oil a few days ago, drained the oil (but did not drain the puke tube, need to go back and do that).

I put in 1.6 Quarts of VALVOLINE™ 4-STROKE FULL SYNTHETIC MOTORCYCLE OIL - 10W40

Never checked the clutch cable, don't even know what it is? The friction zone on my clutch handle feels just fine?

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #4 of 23 Old 01-30-2019, 09:05 AM
 
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Slipping clutch! Make sure the clutch cable is totally slack when the lever is not pulled. No tension at all. You should have to move the end of the lever 3/8 -1/2" or so before any tension comes into the cable. As noted, you must use only oils that do not have "resource conserving" on the donut label on the bottle. Motorcycle specific oils with the JASO MA2 rating are also OK. 10W-40 or 20W-50 are suitable weights. Lighter grades often do have the anti friction additives that ruin wet clutches.

2004 Rebel 250, 2003 BMW K1200GT (roadburner), 2004 BMW R1200GS(all purpose),
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post #5 of 23 Old 01-30-2019, 09:52 AM Thread Starter
 
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Quote:
Originally Posted by Duckster View Post
Slipping clutch! Make sure the clutch cable is totally slack when the lever is not pulled. No tension at all. You should have to move the end of the lever 3/8 -1/2" or so before any tension comes into the cable. As noted, you must use only oils that do not have "resource conserving" on the donut label on the bottle. Motorcycle specific oils with the JASO MA2 rating are also OK. 10W-40 or 20W-50 are suitable weights. Lighter grades often do have the anti friction additives that ruin wet clutches.
I put in 1.6 Quarts of VALVOLINE™ 4-STROKE FULL SYNTHETIC MOTORCYCLE OIL - 10W40

Is that an okay oil?

I am at work now, I will check the clutch cable when I get home!

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #6 of 23 Old 01-30-2019, 10:00 AM
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that is the right oil

1985 Rebel 250 ... 2005 Ruckus 50
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post #7 of 23 Old 01-30-2019, 10:53 AM
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If you're lucky, a lever/cable adjustment will fix it. Otherwise, you'll need to replace the clutch plates.

Did you test ride it before buying? Did you get into the higher gears, and did it slip? Quite possible the PO put the wrong oil in 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 #8 of 23 Old 01-30-2019, 01:06 PM Thread Starter
 
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I did test it, but since I was fresh out the MSF course, I only rode it in a parking lot. My buddy rode it home for me, but didn't mention anything.

Hopefully it's just the lever/cable! I will check it when I get home!

Hopefully the PO put the wrong oil and it's just getting used to the good oil I put in it.

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #9 of 23 Old 01-30-2019, 01:29 PM
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Putting good oil in after the wrong oil isn't going to fix what's happened. The plates will be ruined by the wrong oil and there's no way to reverse that.

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!
Here's how: https://www.hondarebelforum.com/f19/...re-121087.html
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post #10 of 23 Old 01-30-2019, 01:39 PM Thread Starter
 
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Originally Posted by flitecontrol View Post
Putting good oil in after the wrong oil isn't going to fix what's happened. The plates will be ruined by the wrong oil and there's no way to reverse that.
Well, I'm hoping it's just the cable adjustment.

Let's say it's the actual plates, is that dangerous to ride with them in that condition? If it only happens while accelerating hard, would it be an issue?

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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