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Post by martyd on Dec 7, 2012 18:44:42 GMT -5
Does anyone have a link to a good video showing the bottom end
being rebuilt on a 139qmb
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Post by lovemy2strokes on Dec 7, 2012 18:49:58 GMT -5
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Post by millsc on Dec 7, 2012 20:56:52 GMT -5
Does anyone have a link to a good video showing the bottom end being rebuilt on a 139qmb what are you trying to do the gears? They were fairly easy to change just took them to a machine shop and got them pressed, the crankshaft one the other hand was more difficult i watched a vid from 90vert
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Post by martyd on Dec 7, 2012 21:23:33 GMT -5
going to replace crank and cam and gears
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Post by millsc on Dec 7, 2012 21:33:44 GMT -5
Its not that hard just take your time
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Post by millsc on Dec 7, 2012 21:37:00 GMT -5
not sure what crank you'll need since its a trike it's probably different
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Post by kavid2012 on Dec 7, 2012 21:39:28 GMT -5
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Post by larry001964 on Dec 7, 2012 21:43:46 GMT -5
not sure what crank you'll need since its a trike it's probably different Should use the same crank, Id recommend the Narkru HD, and if it were me at least an 83cc kit, the 139 trikes aren't known for having very good performance..
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Post by millsc on Dec 7, 2012 21:48:57 GMT -5
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Post by martyd on Dec 7, 2012 22:14:57 GMT -5
Thanks everyone for your time and help
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Post by martyd on Dec 7, 2012 22:17:34 GMT -5
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Post by millsc on Dec 7, 2012 22:24:49 GMT -5
You may have to bore the case with 52.4 I didnt have to with scrappy 52mm kit
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Post by millsc on Dec 7, 2012 22:28:55 GMT -5
nevermind it says you don't have to bore go for the naraku looks awesome i do like my scrappy 52mm though but naraku is a good brand why not, it looks just like my scrappy kit though domed piston and all
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Post by martyd on Dec 7, 2012 22:30:36 GMT -5
if that turns out to be the case any machine shop should be able to do that right ?
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Post by millsc on Dec 7, 2012 22:32:04 GMT -5
you shouldn't have to bore the case it looks exactly like my scrappy kit it should fit
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Post by martyd on Dec 7, 2012 22:36:33 GMT -5
Awesome what did you think about the cam it is the one they recommend for the kit
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Post by millsc on Dec 7, 2012 22:42:03 GMT -5
i like the cam, the naraku touring cam is nice too would help with hill climbing and take off
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Post by martyd on Dec 7, 2012 22:47:58 GMT -5
millsc thanks for your help you are a valuable asset to this forum you have a wealth of knowledge and have helped me many times as well as many others im sure
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Post by millsc on Dec 8, 2012 0:28:39 GMT -5
the naraku bbk looks awesome didn't have that much much money all at once or would of went that route im sure it would do you good, has .4 more surface area not sure it will affect much but its the max and i like to maximize stuff ;D
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Post by martyd on Dec 8, 2012 0:39:08 GMT -5
I have a pretty basic 160pc socket set are there any other speacial tools im going to need to do this
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Post by millsc on Dec 8, 2012 0:41:33 GMT -5
nope i use a walmart mechanic tool kit i hate to say
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Post by skuttadawg on Dec 8, 2012 0:42:33 GMT -5
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Post by millsc on Dec 8, 2012 0:44:08 GMT -5
you will need a flywheel puller though can get it at scrappys i have an impact and sockets for variator and clutch comes in handy
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Post by martyd on Dec 8, 2012 0:45:36 GMT -5
nothing speacial needed for the crank ?
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Post by millsc on Dec 8, 2012 0:46:31 GMT -5
you'll need the flywheel puller
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Post by martyd on Dec 8, 2012 0:50:10 GMT -5
ok I seen a universal crank installer set on racingplanetusa.com but it was 189$ was not sure if this was needed or not
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Post by millsc on Dec 8, 2012 0:51:08 GMT -5
get the flywheel puller and your tool kit and you can get it done
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Post by martyd on Dec 8, 2012 0:58:23 GMT -5
so did you use the heat and freeze method for the crank and bearings ?
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Post by millsc on Dec 8, 2012 0:59:11 GMT -5
the bearings are already installed on the naraku
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Post by martyd on Dec 8, 2012 1:08:31 GMT -5
fitting them into your crank case though
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