734 kit?? - Yamaha Raptor Forum
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post #1 of 15 (permalink) Old 07-10-2018, 06:59 PM Thread Starter
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734 kit??

I have a week off from work next week and was thinking of ordering a 734 bb kit with a 11.5:1 CP piston. Currently I have an 11:1 wiesco piston. Hc3, hmf exhaust, kkn air and pc5.
Is it worth doing without any head work and stock throttle body?
I definitely want to get the head ported and polished and larger TB but dont want to send them off for weeks during the summer. Basically I will have so free time to work on on the raptor but I would rather wait if there wont be a decent increase. Thoughts?
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post #2 of 15 (permalink) Old 07-10-2018, 07:06 PM
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I thought about going the BB route myself. Save your money for winter, send the head off to get +1 valves and stay stock Bore. BB kits seem to not be as reliable, but if you do go that route a +2 valve job would really help.

[U]2006 raptor 700

DMC Force 4's, FCI W/box, Dynatek Fusion
CP 11:1 piston, BaMotorsports porting, HC3
RacersEdge +3TB
YFZ 450 fronts & reworked rear by JOGACA
Trailtech 1 1/8 xbar w/vapor dash & Vapor installed
ODI Rogue grips & ASV pro pack levers
PRM Edge Baja bumper w/12" Cree spot/flood bar
PRM Desert grab bar
PRM A-Arm skids, GYTR skid, ProArmor swinger skid
Fastway steering stabilizer
68HP 49TQ

PM me if you need service manuals
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post #3 of 15 (permalink) Old 07-10-2018, 07:11 PM Thread Starter
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Originally Posted by morphrider View Post
I thought about going the BB route myself. Save your money for winter, send the head off to get +1 valves and stay stock Bore. BB kits seem to not be as reliable, but if you do go that route a +2 valve job would really help.
Go big or go home right lol.
I wouldn't mind doing both but I wasn't sure about doing the bb first. Probably wouldn't be worth it huh?
Reliability isn't a huge concern because o dont get to ride that much anyways. But obviously I wouldnt want it to grenade itself after 20 hours lol.
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post #4 of 15 (permalink) Old 07-11-2018, 02:44 AM Thread Starter
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Would it be as or more beneficial to buy a 50mm TB and fci intake than the bb kit?
I want to do something to her on my week off lol. Would I see a decent gain running that with my current setup?

Last edited by bristra; 07-11-2018 at 04:30 AM.
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post #5 of 15 (permalink) Old 07-11-2018, 05:51 AM
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Is that hmf exhaust you have a full system or just the muffler? Most gains to be had by a full system. If you do headwork and get a +3tb you will need to change the tune on your hc3.

[U]2006 raptor 700

DMC Force 4's, FCI W/box, Dynatek Fusion
CP 11:1 piston, BaMotorsports porting, HC3
RacersEdge +3TB
YFZ 450 fronts & reworked rear by JOGACA
Trailtech 1 1/8 xbar w/vapor dash & Vapor installed
ODI Rogue grips & ASV pro pack levers
PRM Edge Baja bumper w/12" Cree spot/flood bar
PRM Desert grab bar
PRM A-Arm skids, GYTR skid, ProArmor swinger skid
Fastway steering stabilizer
68HP 49TQ

PM me if you need service manuals
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post #6 of 15 (permalink) Old 07-11-2018, 07:32 AM Thread Starter
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Is that hmf exhaust you have a full system or just the muffler? Most gains to be had by a full system. If you do headwork and get a +3tb you will need to change the tune on your hc3.
It has an fmf powerbomb header with the hmf slip on.
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post #7 of 15 (permalink) Old 07-11-2018, 07:33 AM Thread Starter
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I will definitely get it the head done over winter. But for now I want to add power without have to wait too long lol.
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post #8 of 15 (permalink) Old 07-11-2018, 08:38 AM Thread Starter
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What would you do if you were me?
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post #9 of 15 (permalink) Old 07-11-2018, 01:36 PM
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Would it be as or more beneficial to buy a 50mm TB and fci intake than the bb kit?

No, Not without head porting and big cam it won't. FCI yes. I have had no reliability issues with a BB, just spend the money and get a BB cylinder with larger water jackets and don't do a sleeved cylinder and you will be fine. Just my .02

734 09 Raptor
Meglodon by Bo,KW springs Ferrea valves , Web 4 Cam, 54mm TB, 105.5mm CP cylinder, 14:1 CP, Barkers Inframe, Dynatek Coil, PC V, Dynatek Programable ignition
CCP stabilizer,+5 swinger,Boss Noss Sys, Direct Drive Lock-up, KDS Evac valve,HID Light conversion,SPAL fan
Tuned by EHS Racing 78hp 55Tq
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post #10 of 15 (permalink) Old 07-11-2018, 01:56 PM
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I’m ecstatic with how my 734 performs. No problems with it, I’m on stock bottom end as well. The head is where you get the majority of your gains. I would do it all at once.
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