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post #1 of 36 (permalink) Old 08-04-2010, 02:22 PM Thread Starter
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840 Kit fact/fiction

Ok guys, this has probably been beaten to death but I've had no luck searching the postings. As I research 840 kits I have found that they are definitely not "standardized". Some come with cylinders and a core charge ... some don't. Some claim 11:1 ... some 12:1. A few "with" cylinders mention an additional Nickasil repalting fees $595.00 ... some don't. The Muzzy kit ends up being about $900 with new cylinders after the core is returned. But if I have to have them replated, the cost goes way up.
Do most of the cylinders w/ cores come already Nickasil plated?
Is it cheaper to by some 90mm pistons and have the local machinist do the bore? (remember the Nickasil replating fee above?)
I have totally confused myself.

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post #2 of 36 (permalink) Old 08-04-2010, 02:41 PM
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I am with you on this one. i said screw it and am going with a standard bore kit, since i dont have to screw with all these difrent options.

Most of the standard bore kits just have pistons and cams.
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post #3 of 36 (permalink) Old 08-04-2010, 02:48 PM Thread Starter
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I most likely have cylinder damage so the std bore isn't an option

Salt Lake City, UT

09 Teryx FI Sport
Rear cage Extension with top and seat
Muzzy duals
Dalton Clutch
MSD
HIDs


2010 Dodge 2500 Cummins
08 Weekend Warroir 3200FS
08 KFX 450R (mild mods)
06 Ltr-450 (heavy mods)
99 Yamaha Badger 80
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post #4 of 36 (permalink) Old 08-04-2010, 03:16 PM
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Anyone that bores the cylinders will need to have them nicasil 450.00-500.00, most everybodys kit is different pistons are different, and everybodys cams are different and most everybodys compression ratio is different. Most everyone that I have talked to is happy with what kit they have but after alot of research and talking to several people that sell kits I decided to go with a 840 from Glenn at AMR not for any one reason because there are alot of good kits out there but I just felt like Glenn was the best fit for me and you will get alot of different opinions you just have to listed and go with your gut, you will see this post is going to draw alot of hits. Good Luck with what ever you decide.

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post #5 of 36 (permalink) Old 08-04-2010, 06:24 PM
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So since they banned Mickey.... , who is the new "resident" engine expert on here?
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post #6 of 36 (permalink) Old 08-04-2010, 06:31 PM
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The MUZZY kit comes with bored and replated stock Cylinders, Pistons, rings, and wrist pins. Head gasket and base gaskets. We normally have these in stock for immediate delivery.
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post #7 of 36 (permalink) Old 08-04-2010, 06:38 PM Thread Starter
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Quote:
Originally Posted by rmuzzy View Post
The MUZZY kit comes with bored and replated stock Cylinders, Pistons, rings, and wrist pins. Head gasket and base gaskets. We normally have these in stock for immediate delivery.
Muzzy is definitely running in the front. Thanks for the feedback

Salt Lake City, UT

09 Teryx FI Sport
Rear cage Extension with top and seat
Muzzy duals
Dalton Clutch
MSD
HIDs


2010 Dodge 2500 Cummins
08 Weekend Warroir 3200FS
08 KFX 450R (mild mods)
06 Ltr-450 (heavy mods)
99 Yamaha Badger 80
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post #8 of 36 (permalink) Old 08-04-2010, 09:39 PM
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Quote:
Originally Posted by rmuzzy View Post
The MUZZY kit comes with bored and replated stock Cylinders, Pistons, rings, and wrist pins. Head gasket and base gaskets. We normally have these in stock for immediate delivery.
What kind of head gaskets do your kits come with I noticed that your 900 plus kits had a 3 layer gasket. Just wondering what kind of head gaskets come in the different big bore kits, I have only seen a couple of 840 kits, what kind of head gaskets are in the different big bore or standard bore hp kits ?? Just wondering what kind of kit do you have and what type of head gasket ?? Let me hear from some of you big bore guys.

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post #9 of 36 (permalink) Old 08-04-2010, 09:58 PM
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How much more torque does a BBK make over a STD bore just curious??
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post #10 of 36 (permalink) Old 08-04-2010, 11:57 PM
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You will have to have the cylinders bored and re-plated unless you go with a sleeve which is more expensive and not as reliable and not even worth it because nikasil is better. This will cost you about 450-500 bucks.

You'll need 840 head gaskets as well but you'd have to talk to the builder to know if you need single layer or multi layer... really just depends on the deck height of the pistons being used.

There really is nothing hard about it...

To give you an idea of the difference the torque an 840 makes over a standard bore... My 840 teryx pulls a standard bore about 1.5 to 2 lengths out of the hole.
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