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Opinions on the gx390 Thunderkart
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momac0812



Joined: 22 Jun 2012
Posts: 61
Location: United Kingdom

PostPosted: Fri Jun 29, 2012 5:36 pm    Post subject: Opinions on the gx390 Thunderkart Reply with quote

Hi all,would just like to get ppls opinion on the gx390 thunderkart,Good or bad????as im considering getting one. Laughing
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billy218



Joined: 20 Jul 2011
Posts: 48
Location: nr manchester

PostPosted: Fri Jun 29, 2012 6:38 pm    Post subject: Reply with quote

I`d say go for it......if you`ve got a class to race it in which is pretty local....but if it`s an open class be prepared for the fact that some of the very quick ones may have had serious money spent on them..
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d-i-y72



Joined: 18 Aug 2010
Posts: 149
Location: yorks

PostPosted: Fri Jun 29, 2012 7:31 pm    Post subject: Reply with quote

downside is the cost of the clutch. otherwise should be good pretty much bog standard.clone engines come for under£250 new.
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momac0812



Joined: 22 Jun 2012
Posts: 61
Location: United Kingdom

PostPosted: Fri Jun 29, 2012 8:13 pm    Post subject: Reply with quote

roughly how much would the clutch cost,are the clones just as good as genuines?
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momac0812



Joined: 22 Jun 2012
Posts: 61
Location: United Kingdom

PostPosted: Fri Jun 29, 2012 9:10 pm    Post subject: Reply with quote

What type shaft would i need to get to fit clutch to a honda engine?????????
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karterdan



Joined: 08 Dec 2009
Posts: 427
Location: hertfordshire

PostPosted: Fri Jun 29, 2012 9:36 pm    Post subject: Reply with quote

Granted I've only ever driven one thunderkart, but I felt it was way out of balance having such a heavy engine on one side. Heavier on the braking, and the seat has to be moved way over to fit the engine on.

To get to the top of an open class, like posted above you'll have to spend well over £1500 even to get close.

I know some guys that are making big HP with the GX390's, but it just seems like a waste when you can buy a 16Hp 7700RPM Sealed Super GX200 for £600 and go racing.

Thanks,
Dan
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momac0812



Joined: 22 Jun 2012
Posts: 61
Location: United Kingdom

PostPosted: Fri Jun 29, 2012 10:17 pm    Post subject: Reply with quote

thanks dan,that was one thing i was worried about as im not the smallest bloke and dont fancy sitting at a weird angle just to allow the big engine
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d-i-y72



Joined: 18 Aug 2010
Posts: 149
Location: yorks

PostPosted: Sat Jun 30, 2012 9:33 pm    Post subject: Reply with quote

noram clutch ! £150-200. 1 inch dia q shaft with keyway. there are clones and clones . the loncin seems ok up to a rev limit of 5500.
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d-i-y72



Joined: 18 Aug 2010
Posts: 149
Location: yorks

PostPosted: Sun Jul 01, 2012 12:38 pm    Post subject: Reply with quote

in general i think the place for the 390 gx kart is as a single engined machine running basically standard engines at about 2 secs faster than an msa prokart. you will spend a lot to get the performance of a tkm etc . and probably collect a load of failed parts . imo if you want a high performance racing engine ,buy one in the first place.
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d-i-y72



Joined: 18 Aug 2010
Posts: 149
Location: yorks

PostPosted: Mon Jul 02, 2012 9:23 pm    Post subject: Reply with quote

however karter dan's sealed 200 is interesting. stretton results show these faster than an msa prokart (on open tyres at 150kg.) anybody like to comment on running one of these good or bad. what about vat.
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karterdan



Joined: 08 Dec 2009
Posts: 427
Location: hertfordshire

PostPosted: Mon Jul 02, 2012 9:54 pm    Post subject: Reply with quote

Now we're talking...

Thanks for the positive comments, it looks like we shall have a 10 kart grid for the 15th which is looking good.
We're really pushing it, and we have ellough park onboard for next year as well. A championship spread across a variety of circuits could be interesting!

At the moment, they're set at £600.00 all included. If you're close you can pick it up, or the courier is roughly £35 insured.

We're roughly 1.5 seconds quicker than the top MSA Honda prokarts, and a second a lap quicker than a subaru 7.5hp prokart. Which on a 30 second lap is a lot. On the carosel layouts I wouldn't be surprised if the gap opened up another half second.

Let me know if you're up for it, we should have another 4 engines sorted before next meeting.

Thanks,
Daniel
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Charlie-Tibbles



Joined: 22 Feb 2011
Posts: 156
Location: Leicester

PostPosted: Tue Jul 03, 2012 9:13 am    Post subject: Reply with quote

The super 200's are great the reason i chose it was because its sealed which makes it close and competative. (even with it on a pro kart chassis i really enjoyed it)
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d-i-y72



Joined: 18 Aug 2010
Posts: 149
Location: yorks

PostPosted: Tue Jul 03, 2012 11:55 am    Post subject: Reply with quote

what tyres do you and the rest use charlie? can you make the 150kg limit?
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karterdan



Joined: 08 Dec 2009
Posts: 427
Location: hertfordshire

PostPosted: Tue Jul 03, 2012 3:01 pm    Post subject: Reply with quote

Weight limit is dropped for this season, tyre choice is open.

Thanks,
Dan
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Charlie-Tibbles



Joined: 22 Feb 2011
Posts: 156
Location: Leicester

PostPosted: Tue Jul 03, 2012 4:52 pm    Post subject: Reply with quote

Dan,
Is there going to be a weight limit next season? If so what?
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