Planet Minis

43XR70 · 07-03-2007, 09:42 PM

I added a pipe and UNI filter to my stock 70. I have adjusted the needle clip to every position so far with the same results. It runs best in the second position from the bottom. But in every position I have a very small hesitation when you crack the throttle from idle. If you crack it from any other position other than idle it rips. It just has a slight hesitation off idle(very slight). Messed with fuel screw and idle in every position. I think the main may need to be changed from stock. It sounds like it is starving for gas with almost a sucking noise. Is this the main? 88 kit is coming but my son is going to ride this weekend so I need to figure it out. Thanks in advance..

Kurlon · 07-03-2007, 09:54 PM

Put the stock pipe back on and see how it responds. You may wanna just bump the idle up a bit also. Until that motor is massaged a bit, it won't have perfect throttle response.

steely66 · 07-03-2007, 10:17 PM

dude on your carb where the fuel pipe goes onto the carb fuel cock ok clean inside that with a small pin or fuse wire and blow all the **** out of it ive had this problem many times i tryed rejeting needle height the lot turned out it was the fuel cock blocked.

spiralsun1 · 07-19-2008, 09:09 PM

OMG, that might be the problem I'm having too... TYVM

fiddyonefiddy · 08-18-2008, 08:27 PM

probably since you are letting in twice as much air you should allow twice as much fuel
try jetting the carb if you cant fix it by raising the needle.and it will always hesitate,till you dial it in.

07-03-2007, 09:42 PM	#1 (permalink)
43XR70 PM Newbie Join Date: Jun 2007 Posts: 17	Help with stock 70 motor tune. I added a pipe and UNI filter to my stock 70. I have adjusted the needle clip to every position so far with the same results. It runs best in the second position from the bottom. But in every position I have a very small hesitation when you crack the throttle from idle. If you crack it from any other position other than idle it rips. It just has a slight hesitation off idle(very slight). Messed with fuel screw and idle in every position. I think the main may need to be changed from stock. It sounds like it is starving for gas with almost a sucking noise. Is this the main? 88 kit is coming but my son is going to ride this weekend so I need to figure it out. Thanks in advance..

07-03-2007, 09:54 PM	#2 (permalink)
Kurlon Baron Von BanHammer Join Date: Feb 2005 Location: Windham, ME Posts: 7,863	Re: Help with stock 70 motor tune. Put the stock pipe back on and see how it responds. You may wanna just bump the idle up a bit also. Until that motor is massaged a bit, it won't have perfect throttle response. __________________ http://www.x386.net/TTR 2004 ST3 - 'Duckie'?!?! 2005 CRF70RR - MiniGP Weapon 2005 CRF70 - Dirt Donk 2008 Pitster Pro X4 Motard 1991 GS500E - LRRS/CCS #771

07-03-2007, 10:17 PM	#3 (permalink)
steely66 1st Gear Member Join Date: Jun 2007 Location: canada Posts: 208	Re: Help with stock 70 motor tune. dude on your carb where the fuel pipe goes onto the carb fuel cock ok clean inside that with a small pin or fuse wire and blow all the **** out of it ive had this problem many times i tryed rejeting needle height the lot turned out it was the fuel cock blocked.

07-19-2008, 09:09 PM	#4 (permalink)
spiralsun1 PM Newbie Join Date: Jul 2008 Posts: 28	Re: Help with stock 70 motor tune. OMG, that might be the problem I'm having too... TYVM

08-18-2008, 08:27 PM	#5 (permalink)
fiddyonefiddy 2nd Gear Member Join Date: Dec 2004 Location: Dallas Posts: 320	Re: Help with stock 70 motor tune. probably since you are letting in twice as much air you should allow twice as much fuel try jetting the carb if you cant fix it by raising the needle.and it will always hesitate,till you dial it in.

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