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Old 05-26-2010, 11:16 AM   #16
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about 2 years ago i had similar problems with my ninja tore it apart check everything was ok, great compression...but i did notice the button head didnt fit tight like it use to so i put a new GRP button head and no problems ..hope this help
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Old 05-26-2010, 11:25 AM   #17
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Doug if it's a +4 C 2010 it is most likely done after 4-6 gallons. Every one I know that has run the C 2010 with the new rear bearing had problems at 4-6. Nova should have never changed the motor from the Origional +4 every one I know would get 10+ out of the first batch of +4's I know you know how to tune I race with you every week so I would just get another NINJA See ya Sunday, I hope you make it. I am just going to race Truggy because I have to pit for Ernest and most likely about 10 others : (
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Old 05-26-2010, 04:02 PM   #18
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had a similar prob when i damaged the spray bar in the carb of a novarossi 3-port i barely overtightened the lowspeed when i was resetting it. i no it sounds crazy but it happen.
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Old 05-26-2010, 04:16 PM   #19
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Originally Posted by losi_racer View Post
wtf frank? lol
I did what I usually do. I post before I finish reading your whole post and well then I have to go back and delete. So either way I get it.

Did you ever get it figured out?
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Old 05-26-2010, 05:07 PM   #20
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if it runs good for a couple minutes then starts acting up. it might just be worn out.... I have had engines that felt like they still had decent compression do the same thing and ended up needing a piston/sleeve. Sometimes even if it feels like it has ok compression it might not be enough.

5-6 gallons very well could be?
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Old 05-26-2010, 07:55 PM   #21
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about 2 years ago i had similar problems with my ninja tore it apart check everything was ok, great compression...but i did notice the button head didnt fit tight like it use to so i put a new GRP button head and no problems ..hope this help
i had almost the exact same problem. Except the screws i had in the cooling head were about half a MM to long. Caused all kinds of problems (long story).

I also had similar problems with a stretched/bent rod.
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Old 05-26-2010, 09:32 PM   #22
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It's your connecting rod. I'm guessing you never replaced it after break in? You need to change the con rod on Novas after they lose their mechanical pinch after break in. You should change your bearings while your changing the rod too.
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Old 05-26-2010, 09:45 PM   #23
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Originally Posted by helgso View Post
Even though you think your o-rings are ok, I suggest sealing the carb. A person on YouTube that calls himself Squirrel (his username is Squirrelod) says that even though the o-ring on the carb seems ok, he recommends removing it and sealing with gasket material.

You can find this video here: http://www.youtube.com/watch?v=6xwDy-I0Z4I

He mentions that some gasket material might not be strong enough. Get gasket material that can withstand over 350F for sealing with just in case.

EDIT: Notice that Squirrel also mentions Team Associated's green slime. It's used for sealing the HSN and LSN.
That guy... Nvm got getting into that one.

Quote:
Originally Posted by Marcus Falconie View Post
Doug if it's a +4 C 2010 it is most likely done after 4-6 gallons. Every one I know that has run the C 2010 with the new rear bearing had problems at 4-6. Nova should have never changed the motor from the Origional +4 every one I know would get 10+ out of the first batch of +4's I know you know how to tune I race with you every week so I would just get another NINJA See ya Sunday, I hope you make it. I am just going to race Truggy because I have to pit for Ernest and most likely about 10 others : (
yup, see my next comment

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I did what I usually do. I post before I finish reading your whole post and well then I have to go back and delete. So either way I get it.

Did you ever get it figured out?
i think so, i ran it hard for a good 15 min, white it was still hot, tore it out as fast as i could and felt the compression, its gone. I felt it in the car and it didnt feel great but enough where i didnt think it was the issue. Im prob sending it to alan burton to get a pinch, i ordered new bearings might as well use them. Im buying a new buggy in prob 2 weeks so i dont wanna have another 300 dollar bill on top of a buggy, right now anyway. I think i am moving away from novarossi tho, as marcus said, ive seen many issues with longevity, might go ninja in the buggy too if i can calm it down
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Old 05-26-2010, 09:46 PM   #24
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How old is your fuel? I just had this problem went and bought new gas and the thing ran like a champ.
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Old 05-26-2010, 09:53 PM   #25
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AIR LEAK!! Seal it then see what happens. Oh and check the fuel
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Old 05-26-2010, 09:53 PM   #26
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How old is your fuel? I just had this problem went and bought new gas and the thing ran like a champ.
as stated i tried new fuel too.
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Old 05-26-2010, 09:53 PM   #27
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AIR LEAK!! Seal it then see what happens
did you only read the first post?
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Old 05-27-2010, 08:52 AM   #28
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For the price... you can't beat the Alpha Plus engines (all 3 of them) and the Werks B5.

Be patient on break in with the Alpha... it will take a gallon or more... but it is worth it.
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