Boring out a VN750 engine. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Engine / Exhaust / Cooling
\ From the radiator, through the case and out
the exhaust. If it has to do with the cooling,
engine or exhaust, discuss it here!

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old 01-18-2012, 02:39 AM Thread Starter
Member
 
Join Date: Jul 2010
Location: Upstate, NY
Posts: 71
iTrader: (2)
 
Boring out a VN750 engine.

I'm thinking about boring out my 750. What is the safest to bore it out to? I want to take out the airbox and put on a set of after market pipes when I do this too.


Spock
'93 750 Vulcan

DONE
Coastered
Ear Shave
Re-Jet
EMGO Handlebar
MeanStreak Seat
Oversize Tires
Custom Skeleton Mirrors
Maintenance Free Battery
LED Halo Headlamp
LED Brake Light
LED Turn Signals
Hard Saddle Bags
Custom Plate Mount
Highway Pegs
Custom Skull Radiator Cover
All New Lines and Cables
Custom Neon Green Plug Wires
Iridium Spark Plugs
Kevlar Clutch Plates

PLANNED
Spline Lube
R/R Relocate
Fork Tubes Rebuild
Freeswilly is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 01-18-2012, 06:29 AM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,634
iTrader: (4)
     
Garage
Bore a 750?


Let Jerry write a post for it to read?



If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is offline  
post #3 of 16 (permalink) Old 01-18-2012, 06:40 AM
Members who have donated towards server costs
 
denny6006's Avatar
 
Join Date: Mar 2009
Location: InezKY pop.600
Posts: 5,236
iTrader: (9)
     
Garage
^ I got that ,you are cold man,cold
He did mention three of the deadly sins,touching the stock intake,aftermarket exhaust and God help us all, Modifying a Stock engine,I sure am glad he doesn't want an aftermarket seat.

I sense a rant/tirade coming.I am so in tune with this board,I must be psychotic,,errrr, psychic!

And I must add an "Oh no,you didn't" right about here also.




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
lovin' the new scoot



Quote:
"When all is said and done,usually more is said than done" UNK
Click on one x and drag to the other to read between them.

Psalm 40:1...
XI waited patiently for the Lord; and he turned unto me, and heard my cry. X

Last edited by denny6006; 01-18-2012 at 06:49 AM.
denny6006 is offline  
 
post #4 of 16 (permalink) Old 01-18-2012, 08:35 AM
Giggity!
 
kanuck69's Avatar
 
Join Date: Jun 2007
Location: Ohio, Zanesville
Posts: 4,307
iTrader: (24)
     
Garage
One thing I will say in the act of boring out a 750's engine. You'll have to go find parts. There's no kits for this bike to do that.

It could end up being quite a pricey little project.
kanuck69 is offline  
post #5 of 16 (permalink) Old 01-18-2012, 07:55 PM
Members who have donated towards server costs
 
Join Date: Nov 2007
Location: Chandler, Arizona
Posts: 2,850
iTrader: (0)
 
Vulcan 750 pistons come in two oversizes. They are for repairing a worn engine. You would not gain enough displacement to make any difference powerwise.

I had aftermarket pipes, with a properly jetted stock intake. Sounded great around but were awful out on the highway at 75-80 mph. Went back to stock, lost a lot of money.

Use non stock air filters at your own risk.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
VN750Rider/Jerry is offline  
post #6 of 16 (permalink) Old 01-18-2012, 07:57 PM
Linkmeister Supreme
 
OlHossCanada's Avatar
 
Join Date: Aug 2008
Location: Lethbridge, Alberta, Canada
Posts: 7,960
iTrader: (8)
   
Sorry, but it sounds like more trouble than it is worth to me.
I do recall a member who said his engine was rebuilt with pistons from an 850 Suzuki.
I tried to find a piston that was close enough in size to work, but I couldn`t find one.

If you want a bigger bike, buy a bigger bike. The vn750 is a hot ride for what it is, but you will be throwing good money after bad going this route IMHO.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html
OlHossCanada is offline  
post #7 of 16 (permalink) Old 01-20-2012, 03:14 AM Thread Starter
Member
 
Join Date: Jul 2010
Location: Upstate, NY
Posts: 71
iTrader: (2)
 
I've got one Vulcan and I'm buying another. I want to keep one stock and mod the other. I like the ride of the thing but I wish it had more punch. Moneys not that big of a problem if its to improve the bike the way I want to. I asked the question just to see if anyone had done it or knew info on it. I am going to buy a bigger bike this summer but like I said. I would like more out of one of my Vulcans.


Spock
'93 750 Vulcan

DONE
Coastered
Ear Shave
Re-Jet
EMGO Handlebar
MeanStreak Seat
Oversize Tires
Custom Skeleton Mirrors
Maintenance Free Battery
LED Halo Headlamp
LED Brake Light
LED Turn Signals
Hard Saddle Bags
Custom Plate Mount
Highway Pegs
Custom Skull Radiator Cover
All New Lines and Cables
Custom Neon Green Plug Wires
Iridium Spark Plugs
Kevlar Clutch Plates

PLANNED
Spline Lube
R/R Relocate
Fork Tubes Rebuild
Freeswilly is offline  
post #8 of 16 (permalink) Old 01-20-2012, 06:20 AM
Members who have donated towards server costs
 
denny6006's Avatar
 
Join Date: Mar 2009
Location: InezKY pop.600
Posts: 5,236
iTrader: (9)
     
Garage
Quote:
Originally Posted by Freeswilly View Post
I've got one Vulcan and I'm buying another. I want to keep one stock and mod the other. I like the ride of the thing but I wish it had more punch. Moneys not that big of a problem if its to improve the bike the way I want to. I asked the question just to see if anyone had done it or knew info on it. I am going to buy a bigger bike this summer but like I said. I would like more out of one of my Vulcans.
Lance had custom pistons in his.I think and don't quote me on this but he used vn700 rods and pistons with a slightly different wrist pin location and had it bored maximum over bore,it takes a lot of measuring to get your clearances right at TDC,I also think he said he had some different cams ground as well,I never rode with him but there are several on here who did,that thing ran like a scalded cat ,is the word.

Sadly Ron has passed on. All his knowledge of the 750 as well,they called him "the Professor ",for a reason.




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
lovin' the new scoot



Quote:
"When all is said and done,usually more is said than done" UNK
Click on one x and drag to the other to read between them.

Psalm 40:1...
XI waited patiently for the Lord; and he turned unto me, and heard my cry. X
denny6006 is offline  
post #9 of 16 (permalink) Old 01-20-2012, 08:41 AM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,634
iTrader: (4)
     
Garage
Jerry is right here, you can go up by "honing" the bore to the next oversize, but if your thinking you can "bore it out" to get more displacement....you can't.

No one I know makes big bore parts for this bike... You'd need not only new pistons... But completely new cylinders too....or a full machine shop to drop in a larger sleeve. (the cylinders are aluminum with steel sleeves)

No one makes "hotter" cams either...

I'd say buy yourself a Honda VTX 1800....plenty of AM engine stuff floating around...

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is offline  
post #10 of 16 (permalink) Old 01-20-2012, 08:46 AM
Members who have donated towards server costs
 
denny6006's Avatar
 
Join Date: Mar 2009
Location: InezKY pop.600
Posts: 5,236
iTrader: (9)
     
Garage
Quote:
No one makes "hotter" cams either...
sorry ,but you can get any kind of cam you want custom ground,but you are correct no one sells an aftermarket hot cam,and he said money really wasn't a problem.




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
lovin' the new scoot



Quote:
"When all is said and done,usually more is said than done" UNK
Click on one x and drag to the other to read between them.

Psalm 40:1...
XI waited patiently for the Lord; and he turned unto me, and heard my cry. X
denny6006 is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome