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Old 06-24-2006, 11:05 AM   #601
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Old 07-04-2006, 12:07 PM   #602
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Originally Posted by Slo-MTX4
OK Boy and girls, i am just about ready to throw my JP in the bin. I have rebuilt the carby, tried a different carby and i still cant get a tune on this engine. It a JP FX3 Full option, it wont idle properly, i cant get it to rev or pull out of a corner and last night, it went from running at 70 degrees C in warm up to 233 deg C at the end of a 6 minute race has anyone got any ideas?

Cheers Daniel
I've been having the same problem with my JP .12 modified. I bought it for the sedan nats in crystal park and it cost me my first two qualifiers with DNS'. Anyways, I changed out to different carbs new and old with the same issues of overheating. Harry Hananouchi tuned my motors and set my clutch and it still did the same thing. I would go out to do some practice laps before the race, come in after 4-5 laps with a temp at 210 F. I then would take another lap and it would go completely flat with no power. Come in to the pits with a astonishing 310 degrees F . I've talked to other JP users and some of them claimed they had the same issues . I don't know what to do next which makes this quite frustrating. I have to resort to my 3 year old reliable MR12 TQ racing motor to complete races.
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Old 07-04-2006, 11:10 PM   #603
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Is it an 05 production?
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Old 07-04-2006, 11:14 PM   #604
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Is it an 05 production?
Yeah, I believe so. Team Kanikaze, tell Dante Roger said, Wuzzzz Uppppp !!!
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Old 07-05-2006, 11:49 PM   #605
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Same problem also happened to me. Piston was all black with carbon. Funny thing was temp was still good at about 210. It was good for 3 to 4 laps from start and then it would lose its power from thereon. Seems like it did not overheat but just did not have enough gas passing through.

Could someone assist

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Old 07-30-2006, 08:11 PM   #606
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Anyone have the problem with blowing the seal out of the front bearing. My motor has right around a gallon through it and it has blown this seal. What is a better bearing to put in so this doesn't happen again?
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Old 07-30-2006, 08:42 PM   #607
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Originally Posted by GrandeGixxer
Anyone have the problem with blowing the seal out of the front bearing. My motor has right around a gallon through it and it has blown this seal. What is a better bearing to put in so this doesn't happen again?
Same happened to me. I haven't replaced my bearing yet, keen to hear what is a better replacement than the standard one though.
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Old 07-30-2006, 10:23 PM   #608
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Anyone have the problem with blowing the seal out of the front bearing. My motor has right around a gallon through it and it has blown this seal. What is a better bearing to put in so this doesn't happen again?
Only bearing I can trust replacing it with is the Nova Rossi #17006
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Old 07-31-2006, 04:55 AM   #609
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Originally Posted by B4
Same happened to me. I haven't replaced my bearing yet, keen to hear what is a better replacement than the standard one though.
Soon, I will stock custom made ceramic bearings for most of my engines. Front and rear. They are sure to be better than what the engine companies are using.
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Old 07-31-2006, 05:55 AM   #610
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The 17006 is what the motor comes with from JP. I am not impressed with this one. I have never had a motor blow the seal in this short amount of time.
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Old 08-06-2006, 02:00 PM   #611
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Hi guys,

I haven't ran my .12 JP (forgot the model, black crankcase, purple heatsink, SX12 or something on the side) for about 3 years. However, I put after-run oil in it and made sure nothing got into the engine during this time.

Any tips before firing it up after 3 years of no activity?

Thanks
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Old 08-08-2006, 10:12 AM   #612
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Fire it up and see what happens
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Old 08-08-2006, 12:55 PM   #613
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Default JP FX 21 R03

Hi Guys,

I need to replace the piston/sleeve and rod in an FX 21 R03 engine and don't want to buy the JP parts as the engine is well worn. Can someone tell me what Novarossi p/s/r can be used as a substitute?

Thanks
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Old 08-08-2006, 09:43 PM   #614
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Originally Posted by ralph m
Hi Guys,

I need to replace the piston/sleeve and rod in an FX 21 R03 engine and don't want to buy the JP parts as the engine is well worn. Can someone tell me what Novarossi p/s/r can be used as a substitute?

Thanks
www.axialracing.com

Our Bi metal piston and sleeve set will fit.
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Old 08-09-2006, 10:32 AM   #615
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Originally Posted by ralph m
Hi Guys,

I need to replace the piston/sleeve and rod in an FX 21 R03 engine and don't want to buy the JP parts as the engine is well worn. Can someone tell me what Novarossi p/s/r can be used as a substitute?

Thanks
is this ralph m from nercar?
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