Author Topic: resto/mod project CB400f from Italy (Read 58206 times)

RickB · « **Reply #125 on:** October 25, 2012, 02:25:19 PM »

Depending on whether you have resistive caps and leads, you may have a similar issue that I had. A weak spark.

Have a read through my thread on the issue:

http://forums.sohc4.net/index.php?topic=87505.0

In the end, I determined that it was the different lengths of lead to each spark plug. I know that sounds crazy, but I had brand new Dyna S, Dyna 5ohm coils and leads and caps. After a lot of trial and error, it was the lead length.

Rick.

Mugen_Stumpo · « **Reply #126 on:** October 26, 2012, 06:11:47 AM »

thanks a lot rick...

i have rebuilt the carb again and still have to try to fire up the bike with them mounted... i'll let you guys know

Mugen_Stumpo · « **Reply #127 on:** October 26, 2012, 10:18:39 AM »

today i mounted the freshly rebuilt carbs...

the engine still fire up with only 3 cylinders, the one that is not firing is always the 4th cyl

the weird thing is that 1 month ago the problem was that the 2nd cyl wasn't firing... now the 4th is giving problems even with the rebuilt carbs...

damn!

RickB · « **Reply #128 on:** October 26, 2012, 01:58:56 PM »

Fuel, air, spark. It is one of those issues.

Fuel:
Are your carbs getting fuel? If you open the drain screws in the bowls, do they all have fuel?

Air:
Make sure you don't have a vacuum leak in the rubber manifolds. It's a simple test to do, you'll find plenty of walkthroughs on this forum. If you have a carb sync tool, it couldn't hurt to do that either.

Spark:
Get a multimeter and test your coils. Then leads for resistance. What ignition are you running? Points or electronic?

I would be surprised if it is a problem with your carbs. I would guess an air or spark issue.

Rick.

Mugen_Stumpo · « **Reply #129 on:** October 28, 2012, 07:26:11 AM »

finally i made it!

i cut the plug wires like you did Rick and the bike fired up running good on all 4 cylinders

thank you very much!!!!!

Viktor.J · « **Reply #130 on:** October 28, 2012, 07:43:21 AM »

GREAT, congratulations !

how's she runing on the pods
and
when do you mount the clip ons

Mugen_Stumpo · « **Reply #131 on:** October 28, 2012, 07:58:48 AM »

this is the little #$%*ty video i made this morning

prima accensione a 4

now it's running without any filter, just the rubber staks of the stock airbox, because i want to mount the airbox back for the test...

then change for 85 jets and mount pods

when'll have my license plate, i'll mount the clip-on and everything else, now it's back to 100% stock condition

Stev-o · « **Reply #132 on:** October 28, 2012, 06:36:30 PM »

Good news

Mugen_Stumpo · « **Reply #133 on:** October 29, 2012, 11:11:53 AM »

Hi guys...

i have found this two set of rearsets, i'll try to mount them using a little bracket welded to the frame

the alu one is for a gsx-r, it seems to be shorter than the other on, but the shift lever is pointing the ground, but it looks like that the lever could be self-rotated

the blue one are for a r1, longer mounting plate, but correct shifter bracket

both are made for rear disk, do you think i can use them with the oem drum?

wich one is the best in your opinion?

thanks
thanks

RickB · « **Reply #134 on:** October 29, 2012, 04:58:13 PM »

Mugen_Stumpo,

It took me quite a few frustrating hours to get to shortening the spark plug leads so I'm glad it has helped a fellow SOHC4'er!

Rick.

Mugen_Stumpo · « **Reply #135 on:** October 30, 2012, 02:31:48 AM »

thanks again Rick you saved my mental sanity too

Mugen_Stumpo · « **Reply #136 on:** November 13, 2012, 08:45:51 AM »

new shoks and rearsets arrived!

pics on request

Viktor.J · « **Reply #137 on:** November 13, 2012, 10:47:00 AM »

request

haha, which rearsets did you finally choose ?

Mugen_Stumpo · « **Reply #138 on:** November 13, 2012, 01:03:36 PM »

this one... i just need to weld a plate to the frame and start from there...

i think they'll fit nicely

Mugen_Stumpo · « **Reply #139 on:** November 29, 2012, 03:20:04 PM »

some little news...

stock triple grinded down to shave risers

fork end plug with built-in spring compression regulation

new warnin-light to be integrated in the triple

Stev-o · « **Reply #140 on:** November 29, 2012, 07:43:07 PM »

Love the look of the triple, will you polish it?

Mugen_Stumpo · « **Reply #141 on:** November 30, 2012, 06:05:56 AM »

still have to grind it a little more but i think i'll polish it then do the holes for the idiot lights

Mugen_Stumpo · « **Reply #142 on:** December 06, 2012, 10:19:11 AM »

new stuff

Mugen_Stumpo · « **Reply #143 on:** January 19, 2013, 03:45:10 AM »

progress of the top triple...

shiny shine

Viktor.J · « **Reply #144 on:** January 19, 2013, 04:18:50 AM »

Lovely top tree !
And nice gauge and tail light. When will you mount them ?
And have the temperature started to rise in Italy yet ?

Mugen_Stumpo · « **Reply #145 on:** January 19, 2013, 09:56:12 AM »

thanks Vitor...

the bike is still stock because i have to register it as vintage vehicle... i have the appointment for the 25 of january...

then i'll install everything on the bike making it a bit more personal, the cafè way

as today the wheater was really #$%*ty, rain and super cold... i worked a bit...

painted the cafe fenders satin black... the rear one is a stock fender cut the front one is a vtr race replica

hondamatteo · « **Reply #146 on:** January 19, 2013, 02:15:57 PM »

Would love to see those fork end caps installed. Let me know how they workout when you do. Where did you get them?

Mugen_Stumpo · « **Reply #147 on:** January 24, 2013, 01:15:24 AM »

some solidwork project i have to complete...

Mugen_Stumpo · « **Reply #148 on:** January 26, 2013, 10:47:53 AM »

finally my license plate is arrived...

Mugen_Stumpo · « **Reply #149 on:** January 27, 2013, 05:55:57 AM »

some better pics...

News:

Author Topic: resto/mod project CB400f from Italy (Read 58206 times)