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Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

Thread: Damaged engine mount thread Reply to Thread
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  Topic Review (Newest First)
10-27-2013 8:03 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
I thought it also dumps the voltage to ground and the connector has been known to burn out.
The Triumph users have bypassed the main loom and used different connectors on the MOSFET type reg/rec which also produces a lot less heat due to the way it switches on and off.
Some people have used the R1 reg/rec on the Fireblade but not realised when it went bad that the reg/rec used was the same type as the Honda one, i.e. Shunt type. The correct one to go for is the one stamped FH-xxxx to indicate it is MOSFET.

I don't know if it dumps voltage to ground as I'm not that bright when it comes to electrics.
I do knonw that running a dedicated earth from battery to regulator can help so perhaps that is the case.
10-27-2013 7:43 AM
morpheus20170
Re: Damaged engine mount thread

I thought it also dumps the voltage to ground and the connector has been known to burn out.
The Triumph users have bypassed the main loom and used different connectors on the MOSFET type reg/rec which also produces a lot less heat due to the way it switches on and off.
Some people have used the R1 reg/rec on the Fireblade but not realised when it went bad that the reg/rec used was the same type as the Honda one, i.e. Shunt type. The correct one to go for is the one stamped FH-xxxx to indicate it is MOSFET.
10-27-2013 7:36 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
It is a bypass harness from the Reg/Rec to the battery instead of using the main loom to dump the excess voltage much better and not cause problems with heat and bad earths within the main loom where the earths are currently crimped together (crazy idea from Honda).

The excess voltage gets dumped by the regulator as heat before it ever gets into the harness though.
10-27-2013 7:34 AM
morpheus20170
Re: Damaged engine mount thread

It is a bypass harness from the Reg/Rec to the battery instead of using the main loom to dump the excess voltage much better and not cause problems with heat and bad earths within the main loom where the earths are currently crimped together (crazy idea from Honda).
10-27-2013 7:28 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
That's what I thought about doing. Can get an electrical screwdriver to push back the tabs and release the spade connectors to then bullet to with 12awg wire and an inline fuse holder on the pos side but I'm not sure what size fuse holder/fuse to use.

Me either :-)
It probably depends on what it is that you're feeding the power through and how much current it draws.
I'd start at about 10amp and creep it up if it tends to blow.
10-27-2013 7:26 AM
morpheus20170
Re: Damaged engine mount thread

That's what I thought about doing. Can get an electrical screwdriver to push back the tabs and release the spade connectors to then bullet to with 12awg wire and an inline fuse holder on the pos side but I'm not sure what size fuse holder/fuse to use.
10-27-2013 7:22 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
If I get someone to drill the hole will this affect it being fitted with a Timesert in the future?
Sorry for all the questions especially in my post but thank you very much for all of your help.

While I am talking to you, slightly off topic, I am looking for the 2P natural connector to plug a new harness I want to make from the battery to the new Reg/Rec but I can't find the connector anywhere. Can you point me in the right direction please?

No, the insert is way bigger than the hole (probably around 16mm) and will be exactly the same to install it at a leter date.

I just cut connectors off old harnesses when needed. Use a probe (grinding a wheel spoke to a flat point is perfect for this) to press the pins out of the connector and press the new pins in place.
Otherwise just use bullet or spade connectors.
10-27-2013 7:16 AM
morpheus20170
Re: Damaged engine mount thread

If I get someone to drill the hole will this affect it being fitted with a Timesert in the future?
Sorry for all the questions especially in my post but thank you very much for all of your help.

While I am talking to you, slightly off topic, I am looking for the 2P natural connector to plug a new harness I want to make from the battery to the new Reg/Rec but I can't find the connector anywhere. Can you point me in the right direction please?
10-27-2013 7:12 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
So I could get someone to drill a 12mm hole to take out any remaining thread. I'm just concerned that damage to the frame may be made.

I wouldn't pay somebody else to do it, and I can't see it damaging the frame. Drop the spacer out first if you prefer but you don't need to. You can probably cut through the threads by hand by turning the drill chuck manually rather than drive it through if you're worried about doing damage.
It'd be unusual for a damaged thread to be damaged so badly that the bolt would go straight through, but it is a possibility. Try it before drilling it.
10-27-2013 7:08 AM
morpheus20170
Re: Damaged engine mount thread

So I could get someone to drill a 12mm hole to take out any remaining thread. I'm just concerned that damage to the frame may be made.
10-27-2013 7:08 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
I have seemingly not got a thread left in there from what the garage said but to drill out any remaining thread would mean dropping the engine so I might as well go down the Timesert route if this is the case.

No, you wouldn't need to drop the engine to drill the thread out as you're drilling it to the same diameter as the bolt you're using.
10-27-2013 7:06 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
What is the difference between tapping the thread from the front side once the engine has been dropped and inserting a new thread using Timesert. I am starting to get confused but I have been up since 5.30am to watch the GP.

I wasn't going to drill anything to put a longer bolt through though as the garage seemed to indicate that the M12 bolt would go through the engine. Please correct me if this is wrong.

The reason you need to drop the engine is that to use an insert you need to drill the hole oversize and tap a larger thread so that you can thread the insert into it to bring it back to the original size. To do this without dropping the engine you would also need to enlarge the hole through the frame which would then be a loose fit on the shank of the bolt, so you would need to use a sleeve to fill the gap.
10-27-2013 7:03 AM
morpheus20170
Re: Damaged engine mount thread

I have seemingly not got a thread left in there from what the garage said but to drill out any remaining thread would mean dropping the engine so I might as well go down the Timesert route if this is the case.
10-27-2013 7:00 AM
bladeracer
Re: Damaged engine mount thread

Quote:
Originally Posted by morpheus20170 View Post
What is the difference between tapping the thread from the front side once the engine has been dropped and inserting a new thread using Timesert. I am starting to get confused but I have been up since 5.30am to watch the GP.

I wasn't going to drill anything to put a longer bolt through though as the garage seemed to indicate that the M12 bolt would go through the engine. Please correct me if this is wrong.

I mean _without dropping the engine_ it might be possible to tap the thread for the insert from the left side.
To put a longer bolt through you would need to drill out the remains of the damaged thread. Be sure to use a nut and washer if you go this way.
I personally would go with the longer bolt with nut and washer on the end.
10-27-2013 6:56 AM
morpheus20170
Re: Damaged engine mount thread

What is the difference between tapping the thread from the front side once the engine has been dropped and inserting a new thread using Timesert. I am starting to get confused but I have been up since 5.30am to watch the GP.

I wasn't going to drill anything to put a longer bolt through though as the garage seemed to indicate that the M12 bolt would go through the engine. Please correct me if this is wrong.
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