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Thread: Sparks Timing Key with Bigger Bore and Higher Compression

  1. 02-23-2011, 11:39 AM #1
    sheweezy's Avatar
    sheweezy
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    Sparks Timing Key with Bigger Bore and Higher Compression

    I am interested in the Sparking +6 Timing Key to maybe up my compression a tad bit more. I am running .040 over bore 86mm or 406 with 10:1 compression. I also have a stage 2 cam. I know they do not advise to use with higher compression or bigger bore. Just trying to see if anyone has tried the key with a small upgrade on bore size and compression and if it was at all beneficial or if it hurt the motor.
    '99 402ex

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  2. 02-23-2011, 11:44 AM #2
    sneaky11
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    that would be excellent for your setup!! under 11:1 there is nothing bad with the key... just goods!!
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  3. 02-23-2011, 12:16 PM #3
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    Re: Sparks Timing Key with Bigger Bore and Higher Compression

    Originally posted by sheweezy
    I am interested in the Sparking +6 Timing Key to maybe up my compression a tad bit more. I am running .040 over bore 86mm or 406 with 10:1 compression. I also have a stage 2 cam. I know they do not advise to use with higher compression or bigger bore. Just trying to see if anyone has tried the key with a small upgrade on bore size and compression and if it was at all beneficial or if it hurt the motor.
    They advise you not change compression and bore, because the key advances the timing which generates more heat. When you add compression and bore size, it generates more heat. You can run 11:1 with a Sparks Key, but you will need to use race fuel, A.K.A high octane... 100+.
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  4. 02-23-2011, 12:49 PM #4
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    Wheelie (a member here) makes +3 keys which are more high comp friendly than the +6.
    '05 TRX400EX:
    |White Bros. E-Series Exhaust|Sparks +6° Key|42mm Keihin Carb: 165 Main, 52 Pilot|ESR Airbox Eliminator Kit|TAG T2 Bars|MSR AOF Clutch Perch & Lever|Burgard +2 A-Arms|G-Force Extended Hubs|KFX 450R Shocks|IMS-Roll Classic Bumper|AC Racing Blackline Pro-Peg Nerfs|ITP Holeshot H-Ds|Skat~Trak Extreme Paddles|
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  5. 02-23-2011, 01:01 PM #5
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    Originally posted by bkelley
    Wheelie (a member here) makes +3 keys which are more high comp friendly than the +6.
    Still need to use 100 or a mix according to wheelie last time I asked.
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  6. 02-23-2011, 02:06 PM #6
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    Originally posted by CJM
    Still need to use 100 or a mix according to wheelie last time I asked.
    Depends on the compression, I think. I thought he said 11:1 with a +3 key is premium pump safe. I could be wrong, though.
    '05 TRX400EX:
    |White Bros. E-Series Exhaust|Sparks +6° Key|42mm Keihin Carb: 165 Main, 52 Pilot|ESR Airbox Eliminator Kit|TAG T2 Bars|MSR AOF Clutch Perch & Lever|Burgard +2 A-Arms|G-Force Extended Hubs|KFX 450R Shocks|IMS-Roll Classic Bumper|AC Racing Blackline Pro-Peg Nerfs|ITP Holeshot H-Ds|Skat~Trak Extreme Paddles|
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  7. 02-23-2011, 02:19 PM #7
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    Originally posted by bkelley
    Depends on the compression, I think. I thought he said 11:1 with a +3 key is premium pump safe. I could be wrong, though.
    I was going to do the +3 key, he told me 11:1 needs 100 octane still.
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  8. 02-23-2011, 02:30 PM #8
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    Then it was 10:1 and the +3 key for pump premium. Eventually I'm going to go with a 11:1 and the +3 and run E85.
    '05 TRX400EX:
    |White Bros. E-Series Exhaust|Sparks +6° Key|42mm Keihin Carb: 165 Main, 52 Pilot|ESR Airbox Eliminator Kit|TAG T2 Bars|MSR AOF Clutch Perch & Lever|Burgard +2 A-Arms|G-Force Extended Hubs|KFX 450R Shocks|IMS-Roll Classic Bumper|AC Racing Blackline Pro-Peg Nerfs|ITP Holeshot H-Ds|Skat~Trak Extreme Paddles|
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  9. 02-23-2011, 04:42 PM #9
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    Originally posted by sneaky11
    that would be excellent for your setup!! under 11:1 there is nothing bad with the key... just goods!!
    X2
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  10. 02-23-2011, 04:58 PM #10
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    okay! thanks for the info.. i am about to start my rebuild this weekend and was gunna run the 04-05 450r carb.. how bad is the heating issue if i went with the +6 key? something in the need of upgraded oil coolers and reservoir or just in need of a better octane fuel? wanted to keep the lower compression to keep from having to upgraded studs and cooling... and about the +3 key does anyone know the thread i could find about wheelie's key or get in touch with him?
    '99 402ex

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