Mikuni TM 40

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Mikuni TM 40

Post  appleseed on Thu May 21, 2015 7:26 am

I have been thinking about getting one for a while but am not sure if it is worth the expense also does any one know if it will fit with the acerbis tank.

lastly are they available in the UK or do I need to get one from the states (or elsewhere)?

cheers.
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Re: Mikuni TM 40

Post  BuRP on Thu May 21, 2015 11:28 am

Almost sure it will fit with that tank, mine does with all IMS, Safari & std tanks.
Bought mine from XRsOnly, new of course, and have neither will regret it.
Nigh on instant response, lighter on fuel, plenty oomph, simple as pie.
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Re: Mikuni TM 40

Post  appleseed on Thu May 21, 2015 11:47 am

cool, ill see if i can find one for cheep Smile
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Re: Mikuni TM 40

Post  Mad Frosty on Thu May 21, 2015 7:08 pm

For the US guys - Power barn its a good place to get one from , here in the UK http://www.allensperformance.co.uk/mikjets.html
Just make sure that you get the jetting right , i have found that the popular 25 pj was too rich for the hot season , 22,5 , around 3 turns out on the the fuell screw , 25 in the winter around 2,25 turns out , with a Full FMF Q4 system . 145 MJ , i remember that i needed to change the needle as the one suplied with the carb was miles away , but cannot remember which one i got now m need to have a look , it was what allensperformance have recomended and it made a big difference .
The hardest thing to get right for me is the correct float level , mine is still not 100% , if you start with the factory setting , it will start super easy , when cold and the bike its parked on a flat but it will stumble going up or down hill , and it is impossible to start it once hot on a steep hill , ( loads of swearing and sweat comes to mind ) , the fuell level need to be dropped
as there is too much fuell in the bowl !!! , i dont know yet what the perfect setting is but i am at 1,8mm up from the factory setting , that made the cold start little bit harder but it starts first kick anytime when hot , and importantly on a steep hill !!!
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Re: Mikuni TM 40

Post  Mad Frosty on Thu May 21, 2015 7:16 pm

OK this is the perfect needle for UK climate , 9DJY4 , mine came with Y1 which was way too lean , even the Y5 would be good , i am on third clip without the plastic washer spacer , oh and the air jet is 1.2 . Bananatool
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Re: Mikuni TM 40

Post  appleseed on Thu May 21, 2015 7:39 pm

cool, thanks for that.

i assume you are pretty close to sea level?
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Re: Mikuni TM 40

Post  Mauser on Thu May 21, 2015 7:55 pm

appleseed wrote:cool, thanks for that.

i assume you are pretty close to sea level?
Not close enough....Fruities head under the sea is ideal ?

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Re: Mikuni TM 40

Post  appleseed on Thu May 21, 2015 7:58 pm

whaaat scratch
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Re: Mikuni TM 40

Post  Mad Frosty on Thu May 21, 2015 8:17 pm

Yes i am at sea level from 0 up to 1200 feets on my average ride .
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Re: Mikuni TM 40

Post  Mad Frosty on Thu May 21, 2015 8:21 pm

Mauser wrote:
appleseed wrote:cool, thanks for that.

i assume you are pretty close to sea level?
Not close enough....Fruities head under the sea is ideal ?

You see that is why i have kept the snorkel thingy , in case i need to ride bellow the sea level it will prevent water ingestion razz
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Re: Mikuni TM 40

Post  Mauser on Thu May 21, 2015 9:03 pm

lol good reply Smile

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Re: Mikuni TM 40

Post  appleseed on Thu May 21, 2015 10:39 pm

Frosty, did you get new throttle cables with the card or do the stock ones work?
only ask as powerban give you the option for longer ones but allens does not have them listed on their site.

ta
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Re: Mikuni TM 40

Post  Mad Frosty on Thu May 21, 2015 11:40 pm

I have ordered the longer ones but i did not need them , so i bought the standard lenght ones (motion pro ).
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Re: Mikuni TM 40

Post  appleseed on Fri May 22, 2015 10:28 am

ordered one from Allens
with the following jets and needle.

Needle 9DJY4
pilot jet 22,5 & 25
main jet 145
air jet 1.2

hopefully it is as good as people have said... StirPot
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Re: Mikuni TM 40

Post  appleseed on Fri May 22, 2015 10:41 am

Frosty, where did you get you get the throttle cables from?
ta
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Re: Mikuni TM 40

Post  SkidMark on Fri May 22, 2015 10:52 am

motion pro does custom length cables
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Re: Mikuni TM 40

Post  Mad Frosty on Fri May 22, 2015 12:20 pm

I have ordered mine from Power barn , as it was the most complete kit with the better Motion pro cables and the adapters already installed + they have send me 3 Pilot jets and 3 main jets
so i could fine tune it . It was not the cheapest place to get it from plus i was hit by the usual import taxes ripoff so the total cost was about £450 if i remember .
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Re: Mikuni TM 40

Post  Mad Frosty on Fri May 22, 2015 12:40 pm

Make sure that you get the adaptors to fit the carbie , and it will need to be tilted slightly to the left to avoid the mechanism rubbing against the fuell tank .
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Re: Mikuni TM 40

Post  appleseed on Fri May 22, 2015 1:51 pm

ok, I did mention to Allens that it was for an XR, are they not included in the Kit?
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Re: Mikuni TM 40

Post  appleseed on Fri May 22, 2015 1:56 pm

i just spoken to Allens and he said that the adapters are already pressed on to the carb

hopefully its the right carb etc.
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Re: Mikuni TM 40

Post  Mad Frosty on Fri May 22, 2015 2:03 pm

appleseed wrote:i just spoken to Allens and he said that the adapters are already pressed on to the carb

hopefully its the right carb etc.
They are fairly knowledgeable about the carburettors , and if they have said that the adaptors are already installed there is nothing to worry about nice
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Re: Mikuni TM 40

Post  appleseed on Fri May 22, 2015 2:06 pm

hope so as i dont want to pee about more that necessary

but Ill probably have to bug you for tips...
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Re: Mikuni TM 40

Post  Mad Frosty on Fri May 22, 2015 2:11 pm

Start with the float level , i would start with lowering the fuell level by rising the adjustment by 1mm from th factory setting and go from there , trust me everybody i know had the same problem with it there is just too much fuell in the bowl on the stock setting , unless you live on a totaly flat area then it might work fine Wink
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Re: Mikuni TM 40

Post  appleseed on Fri May 22, 2015 2:31 pm

ta, Cambridgeshire is pretty flat but i hope to venture to more "elevationary" diverse terrain like salisbury, yorkshire or maybe spain in the not to distant future....
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Re: Mikuni TM 40

Post  appleseed on Sat May 23, 2015 11:25 am

Mad Frosty wrote:i dont know yet what the perfect setting is but i am  at 1,8mm  up from  the factory setting

I assume you mean the float level is +- 21mm?

Yes it arrived today so I though fork it I''l play with it instead of doing house work...
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