780cc or more, big power gains - Yamaha Raptor Forum
 
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post #1 of 3 (permalink) Old 10-15-2019, 05:25 PM Thread Starter
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780cc or more, big power gains

Hi everyone,
Im new to the forum and own a 2016 raptor rse
With barkers dual exhaust system, pc5 and a hi flow intake system without lid Im pretty sure its a big 3 kit.(I mainly run sand dunes or desert) but after a while got use to the power and I want more now. I live outside usa so sending parts for porting is almost impossible but I could pay for a ported head but not for a ported case. Im looking at a 780cc kit from bp racing, this is included:

NEW 105.5mm big bore cylinder11:1 CP piston kit (12.5:1 and 14:1 also available)Hotrods

5mm Crank with rod and heavy duty main bearings

Hotcams Stage 3 Camshaft

Complete gasket set
Crankcase sealsCam chainEngine roller bearings (transmission, balancer, cam, etc)

1. What else I could add to this?

2.Is this a good kit?

3.Are there any 800+cc kits that dont require case modification?

If there are better options im able to pay up to 2.5k
I live in chile and 97 gas is available everywhere but I dont know how much compression I can run with that.
Im looking for this power to be able to beat can ams x3s and big power units, hope for your advice
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post #2 of 3 (permalink) Old 10-15-2019, 08:44 PM Thread Starter
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Update#
I found on the same page(bp racing) an 815cc
Kit with the same things and brands but with a hod rod cam stage 3 for 1.3k
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post #3 of 3 (permalink) Old 10-20-2019, 02:37 AM
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Join Date: Jun 2012
Location: PACIFIC N.W.
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Quote:
Originally Posted by Matiask1 View Post
Hi everyone,
Im new to the forum and own a 2016 raptor rse
With barkers dual exhaust system, pc5 and a hi flow intake system without lid Im pretty sure its a big 3 kit.(I mainly run sand dunes or desert) but after a while got use to the power and I want more now. I live outside usa so sending parts for porting is almost impossible but I could pay for a ported head but not for a ported case. Im looking at a 780cc kit from bp racing, this is included:

NEW 105.5mm big bore cylinder11:1 CP piston kit (12.5:1 and 14:1 also available)Hotrods

5mm Crank with rod and heavy duty main bearings

Hotcams Stage 3 Camshaft

Complete gasket set
Crankcase sealsCam chainEngine roller bearings (transmission, balancer, cam, etc)

1. What else I could add to this?

2.Is this a good kit?

3.Are there any 800+cc kits that dont require case modification?

If there are better options im able to pay up to 2.5k
I live in chile and 97 gas is available everywhere but I dont know how much compression I can run with that.
Im looking for this power to be able to beat can ams x3s and big power units, hope for your advice
Bigger isn't always better or cheap. Anything bigger then 105.5 will require case boring for a bigger sleeve. The 105.5 cylinders have been known to have head gasket problems unless you use a premium SCE gasket.

A CP piston is preferred for stock or big bores. Anything over 12:1 should use a head stud kit. Anything over 11:1 may require 93 octane or better using RON to determine octane. Be sure your 97 will meet those requirements.

Hot Rod 5mm stroker cranks have proven to be unreliable and fail. A 5mm stroke will add .5 to compression on a stock bore, and .7 to a 105.5 bore. So, a 11:1 piston with 5mm stroke would be corrected to 11.5:1 or 11.7:1 total.

Without porting, you won't get the full potential of this build.

A stage 3 cam would be a good choice.

My Raptor, stock bore, 5mm stroke, 11.5:1 CP corrected, DMC Force Four, FCI, HDD5050, bored throttle body and more was 70+ horse power. NOW, I have a Can-Am X3 RS and I can tell you it's a loosing battle to keep up. Your best choice, and maybe cheaper would be a turbo system.

WELCOME TO THE FORUM.

'19 Can-Am X3, RS Turbo, 172 HP, 1300x15 STU #2 paddle, Tribute front, DynaTec controller, cat delete, GTP blow off valve, custom flame wrap, Bent Metal windshield, Blazer wiper, rear window, 48in LED light bar, 14in LED light bar, GTP LED side lights, S3 shock tower brace, aluminum rear pull plate, 5K Badlands winch, dual batteries, 5ft lighted whips, Rugged radio and intercom, interior lights, rock lights, chase lights, over $200 additional switches, YES, street legal with dirt tires.
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