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Old 08-19-2009, 06:26 PM   #1
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Default Jammin JPX21 vs Reedy 121VR?!?!?!

I know everyone loves the vs threads but I need some help deciding on one of these two motors. I have spent the better part of the last two weeks reading about these motors and I havent been able to see a clear cut winner between the two.

I am lookng to replace my Axe Rossi Mamba with one of these motors so if there is anyone out there that has ran all three of these motors and can give me some insight I would greatly appreciated it.

If you havent ran the Mamba but have ran both the Jammin and Reedy motors I would like to hear what you think about the motors.

The main things I am looking for.

1) Durability (gallon life)
2) Run time (how many minutes on a 125cc buggy tank)
3) Low end grunt
4) Top end speed

I know that 3 and 4 can have a lot to do with clutch setups and pipes but I am hopeful someone has tried both these motors on the same pipe with the same clutch setup.

Again any insight you may have is greatly appreciated.
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Old 08-19-2009, 07:08 PM   #2
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ive seen many of the jammin motors run. they seem really fast and just as fast as the $400-500 engines. a guy at the track i race at runs a jp-3 pipe with his with byrons 25% fuel and hes getting 9-10 min. i picked one up the other day. breaking it in tomorrow so ill let ya know how it feels. ive never seen the reedy engine run yet.
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Old 08-19-2009, 07:19 PM   #3
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Quote:
Originally Posted by NeoNot View Post
I know everyone loves the vs threads but I need some help deciding on one of these two motors. I have spent the better part of the last two weeks reading about these motors and I havent been able to see a clear cut winner between the two.

I am lookng to replace my Axe Rossi Mamba with one of these motors so if there is anyone out there that has ran all three of these motors and can give me some insight I would greatly appreciated it.

If you havent ran the Mamba but have ran both the Jammin and Reedy motors I would like to hear what you think about the motors.

The main things I am looking for.

1) Durability (gallon life)
2) Run time (how many minutes on a 125cc buggy tank)
3) Low end grunt
4) Top end speed

I know that 3 and 4 can have a lot to do with clutch setups and pipes but I am hopeful someone has tried both these motors on the same pipe with the same clutch setup.

Again any insight you may have is greatly appreciated.
To answer your questions:
1. Jammin motor 7-9 gallons. Reedy to new to tell
2. Jammin motor 7mins top. Reedy 9mins45secs (my bottom is still fat)
3. Jammin not bad. Reedy to smooth to feel it, but has the power to over jump
4. Jammin can keep up. Reedy super quite but moves with the speeds and Ninja

I had both motors, the Reedy I love for hard core racing and I do very well with it. The Jammin I would only use for practice to keep the miles of your Reedy. The Reedy is just tricky to tune, you'll have to play with it and learn it first. Make sure you run 30% nitro 10-11% oil with the Reedy though. I think I had to change my bearings in the Jammin often too. Its been a year or two since I ran one.
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Old 08-19-2009, 09:57 PM   #4
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i have a jammin jpx.21 i'll sell you real cheap. its like new. only has about 10 tanks. it runs greatt. i put ceramics in it as well. askin 150obo
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Old 08-19-2009, 10:11 PM   #5
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i run the jammin .21 in my buggy. the way i see it as is that everyone is now making these motors that will last you 10-12 minutes and IMO you will need that little more runtime to even last a big race! im getting the nova plus 4..you should look into that!!
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Old 08-20-2009, 06:11 AM   #6
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I am very happy with my Jammin, On gallon 4 right now.
I get 7:30 to 8:00 on a tank in buggy.
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Old 08-20-2009, 09:02 AM   #7
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running little fat im getting over 10 minute with my jpx 21 with short double bend header and 086 pipe. im sure the reedy will get the same. iv seen some reedys and there good engines. either the jpx 21 or reedy are a good choice
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Old 08-20-2009, 12:14 PM   #8
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mines to new to give a good review but so far my reedy has been painless and very enjoyable. I like the carb. I looked on horizon and the piston and sleeve are 74.99, rod is like 30-33 bucks.... Cheap engine parts is something i like to factor in as well considering it's a consumable part of racing.
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