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Author Topic: Yoshi "Cherry-Bomb" question  (Read 650 times)

Offline JPW59165

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Yoshi "Cherry-Bomb" question
« on: January 05, 2013, 10:28:12 am »
I just bought this 07 LT-R450 and of course the previous owner removed the sparky, air box lid and had a Cherry-Bomb installed. The races I participate in require a sparky, and sometimes I ride in mud/water. Is there anything special to removing the Cherry-Bomb when I put the sparky and lid back on?

Do I need to disconnect the battery, then remove the Cherry-Bomb so that the ECU resets back to stock tune?

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Offline Dezsled

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Re: Yoshi "Cherry-Bomb" question
« Reply #1 on: January 05, 2013, 10:49:21 am »
When I got my ltr450 I rode it without the cherry bomb... Then installed one, I wouldn't ride it without one after that! Increased rev ceiling, way more power... Wheelied a lot easier. I never removed it so I don't know how to reset it to stock.

IIRC there was a plug (similar to a child resistant safety plug for wall outlets) that went into the cherry bomb plug in when it wasn't installed in the wiring harness.
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

Offline Mitch Keller

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Re: Yoshi "Cherry-Bomb" question
« Reply #2 on: January 05, 2013, 11:53:04 am »
Whats a "Cherry Bomb" ?
F Mitch Keller

Offline Dezsled

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Re: Yoshi "Cherry-Bomb" question
« Reply #3 on: January 05, 2013, 12:02:24 pm »
It's a plug in that let's the ignition rev a lot higher. Must have item imo. Google has pics.
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

Offline El Diablo

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Re: Yoshi "Cherry-Bomb" question
« Reply #4 on: January 05, 2013, 01:45:23 pm »
It's a plug in that let's the ignition rev a lot higher. Must have item imo. Google has pics.

Not to be confused with the Answer Roost Boost. The Cherry Bomb actually works on the LTR.
Brian
1988 Suzuki LT-250R (The HPR test mule)
1987 Suzuki LT-500R
1990 Suzuki LT-500R
1982 Honda ATC-185S
1982 Honda ATC-250R

Offline JPW59165

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Re: Yoshi "Cherry-Bomb" question
« Reply #5 on: January 05, 2013, 04:05:15 pm »
It doesn't just let the engine rev higher, it accesses another tune pre-programmed into the ECU (like a switch) that adds more fuel to the combustion chamber due to the increase in air flow and less restrictive exhaust. The "accessible" tune probably has a higher spark timing as well along with other little tidbits.

I don't need more fuel, machines are tuned for sea level, I am at approximately 4250'. If anything I need it to run leaner than normal, for example:

My LT250R is jetted from the factory with a 45 pilot, needle on 3rd clip, a 210 main jet and air screw 1.5 turns. I run a 45 pilot, needle on 2nd clip, a 195 main jet and air screw almost 1.75 turns out to compensate.

Well, I ended up disconnecting the battery, then unplugging the Cherry Bomb, and reconnecting the battery. Hopefully this is good to go.

 

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