Start and ride bike without key + Very hard to start - Honda Rebel Forum
 
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post #1 of 9 Old 02-01-2019, 08:17 AM Thread Starter
 
Join Date: Jan 2019
Posts: 75
Start and ride bike without key + Very hard to start

I hope it's not taboo to ask about another bike here...

My buddy bought a 1972 Honda CB450K from a used motorcycle vintage dealer. They were supposed to have fixed up the bike as it was a "Barn Find", but they definitely lied about it. He's had issues from day 1, and they obviously refuse to do any of the repairs for free, even though he literally brought the bike back the next day for issues.

With that said, he's replaced his stator and battery through them.

Now, the bike is very hard to start up, and he can also start it and ride it without a key. He has to disconnect his battery when he's not riding it to make sure it doesn't drain it all night.

I've been looking online, and I think we should try to clean his carburetor, but I've had such success on this forum with my bike, I wanted to ask for yall's input.

Also, any ideas of how to fix the whole being able to start it and ride it with no key (even though it's in the off position)?

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #2 of 9 Old 02-01-2019, 08:42 AM Thread Starter
 
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Also, his bike has 13K miles, but could be wrong because speedometer was replaced at one point.

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #3 of 9 Old 02-01-2019, 09:01 AM
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First, I don't recommend rewarding a shop that knowing sold a bike in poor condition by paying them to fix it. I've had some success getting sellers to do the right thing by reporting them to the Better Business Bureau.

When he does get it started, how does it run at idle and at speed?

I would recommend checking compression and spark. If the bike will start easily when jumped from a car battery (make sure the car engine isn't running!), the bike battery either isn't fully charged, or is bad out of the box.

A parasitic drain is causing the battery to discharge when parked. He needs to find what's 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 #4 of 9 Old 02-01-2019, 09:13 AM Thread Starter
 
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He has a trickle charger that he uses for it, but still has issues. I think he's checked the battery, and that's not been the issue.

He says that when it's finally started, it idles "Weird" or not like it normally should.

I will check compression and spark! Do you think it might be needing the carb clean, or no?

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #5 of 9 Old 02-01-2019, 09:21 AM
 
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Start and ride without a key and left to sit the battery drains down?
sounds like it has been hot-wired to bypass the key switch; google shows a wiring diagram indicating it has a "park" position for the key switch that leaves the tail light on which is likely engaged all the time....

2009 Honda Rebel 250; 2009 Honda Shadow 750 Spirit
"The bravest thing for me to do is admit when I am wrong" - unknown
HRF Answer #1 You should take the MSF Rider Course
HRF Answer #2 You need to clean your carburetor
HRF Answer #3 Sorry we assumed if you didn't say otherwise
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post #6 of 9 Old 02-01-2019, 09:37 AM Thread Starter
 
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Quote:
Originally Posted by kryton View Post
Start and ride without a key and left to sit the battery drains down?
sounds like it has been hot-wired to bypass the key switch; google shows a wiring diagram indicating it has a "park" position for the key switch that leaves the tail light on which is likely engaged all the time....
He did suspect that someone might've tried to steal it at one time, so maybe? Idk.

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #7 of 9 Old 02-01-2019, 11:59 AM
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Poor idle and not running well at speed can be due to a dirty carb, poorly adjusted idle, both, or other causes. But idle and dirty carb are the most common.

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 #8 of 9 Old 02-01-2019, 04:06 PM Thread Starter
 
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Originally Posted by flitecontrol View Post
Poor idle and not running well at speed can be due to a dirty carb, poorly adjusted idle, both, or other causes. But idle and dirty carb are the most common.
Ah! Good to know! Will take this and work on it, thanks!

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #9 of 9 Old 02-01-2019, 08:31 PM
 
Join Date: Dec 2018
Location: Southern Arizona
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tell your buddy he scored a sweet vintage bike. i'm jealous. also, it will never perform like a modern motorcycle...even as 'modern' as 1985, and he can probably expect consistent problems for the life of the bike. Early '70s and late '60s Japanese bikes are extremely hard to find and they aren't high performance or daily riders unless you wrench on them every couple days.

Unless it's been modified it has points ignition/condenser and those have to be confirmed in good shape and gapped correctly or it will never run right...and the problems with points often are similar to fuel problems caused by dirty carb (stuttering, surging, sometimes running good/bad)

it's not taboo to ask about another bike but because of the points ignition that bike really belongs to another era of Honda and the Honda Twin forums is the place he should join. https://www.hondatwins.net/forums/forum.php

If it runs without the key then it was either hot wired or the ignition chamber for the key is worn out so the key can come without fully turning the key cylinder. I took my key out the other day and it didn't kill the engine because the ignition plastic had been broken so I rigged it all back together with a hose clamp and some inner tube rubber.

1985 CMX 250

You look much less stupid locking your handlebar lock every night no matter where you park it than looking at the empty space where your bike was last parked.
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