Engine Mods? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 01-20-2014, 11:50 PM Thread Starter
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Engine Mods?

I have been rebuilding my 86 vn750 and am nearly ready to tackle the engine
which is pretty good apart from a valve noise that I think may be a valve spring.
From looking around the forum and since the engine is out I thought I would do a few mods. What I am intending is

stator mod
clutch mod
MCCT's (already done)
changing to a single air filter under tank

I have read about Dampers but not sure what the problem is with them

Is there anything else that I should consider doing

thanks
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post #2 of 7 (permalink) Old 01-21-2014, 03:00 AM
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Quote:
Originally Posted by kitecrazy View Post
I have been rebuilding my 86 vn750 and am nearly ready to tackle the engine
which is pretty good apart from a valve noise that I think may be a valve spring.
From looking around the forum and since the engine is out I thought I would do a few mods. What I am intending is

stator mod
clutch mod
MCCT's (already done)
changing to a single air filter under tank

I have read about Dampers but not sure what the problem is with them

Is there anything else that I should consider doing

thanks
The thing with the dampers is that after a long period of time, (In my opinion mostly on on bikes that sat for a long time not being run) the rubber dampers dry out and become hard, then crack and break apart. If the engine is run for any significant amount of time like this, the balancer gears can come apart and cause massive damage to the engine case.

as far as other mods, you might want to look into the Pickup coil mod:
https://www.vn750.com/forum/showthread.php?t=18190

and maybe the ignition coil mod as well.
https://www.vn750.com/forum/showthread.php?t=17276


One that I Just finished is deleting my reserve lighting unit, ripping apart the wiring harness to remove all of the old related wires, and installing a relay to run the headlight and using the headlight switch to control the state of the relay which determines the state of the headlight.

This remove nearly all of the amperage from running through the headlight switch, and allows an almost direct connection from the battery to the headlight.

......I'd rather wake up in the middle of nowhere then in any city on earth.

*2014 VN900 Custom (16,200 miles and counting)
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post #3 of 7 (permalink) Old 01-21-2014, 04:09 AM
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I'm not sure if you plan on splitting the case or not, but I would at least pull the right side case cover and check the impeller (water pump) shaft. Check for lateral play, and how much if any wobble it has to it. I'm in the process of rebuilding my 93' engine which had a circlip come loose from the water pump. Another engine I took apart had loose bearings within the.water pump shaft.


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post #4 of 7 (permalink) Old 01-21-2014, 08:49 AM
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I would recommend replacing the internal shift rod with the heavier duty one and replace the seal where the external goes through the case.

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Mods
Voltmeter/clock/temperature gauge
HD Electra Glide Fairing
Earshave/Coastered/CA emissions - gone...
R/R relocated
Nightster seat
Tombstone taillight
Drag specialties turn signals relocated
Sportster progressive shocks... Dropped rear 1 1/2"
Progressive Fork Springs dropped front 1"
NGK plug wires and iridium plugs
Coil Relay Mod
Paint
ACCT to MCCT
Honda Rebel luggage rack
VN800 Handlebars & controls
Screamin Eagle mufflers
F&S Engine Guard & Kury highway pegs
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post #5 of 7 (permalink) Old 01-21-2014, 11:53 AM
..have a vulcan good day!
 
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Quote:
Originally Posted by Jakzen View Post
I would recommend replacing the internal shift rod with the heavier duty one and replace the seal where the external goes through the case.

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x2 If splitting the case. Absolutely....the hd rod only costs $6.00 !

The six (or 5 ?) Dampers cost about $40.00 - Replace them while the engine is out .... my $700. damage pics in my Avatar/photo Albums.

btw: The Damper bolt is a LH thread.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #6 of 7 (permalink) Old 01-23-2014, 04:08 AM Thread Starter
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Thanks for the replies guys I will have a good look at those points
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post #7 of 7 (permalink) Old 01-23-2014, 09:07 PM
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If you really wanna get rad....long as the engine's out....put a new set of Wiseco Hi Comp pistons and rings in...polish and match the intake and exhaust ports....remove the plastic elbows on the carb and replace with brass CVK Hi-Flows....

The last is important, because the plastic junk will eventually break, and you'll need to pull the carbs...may as well do it now....theyre cheap...

Might want to go up one size on the main jets in the carbs too...these things ran very lean from the factory, and it helps to balance things out w/o a lot of math (intake vs exhaust)...



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