No Power

corky · Post by **corky** » Fri Feb 27, 2009 8:01 pm

exactly the same on the hybrid at oulton wouldnt rev past 8k

tried everything, swapped carbs, jets, held power valves open, changed coil twice , pick up and rectifier......nothing

got it home changed rectifier again ....it worked fine

bloody rectifier was duff and then fitted another duff one

so try that mate if you havnt already

Bertie_Mollie · Post by **Bertie_Mollie** » Fri Feb 27, 2009 8:25 pm

corky wrote:exactly the same on the hybrid at oulton wouldnt rev past 8k

tried everything, swapped carbs, jets, held power valves open, changed coil twice , pick up and rectifier......nothing

got it home changed rectifier again ....it worked fine

bloody rectifier was duff and then fitted another duff one

so try that mate if you havnt already

Thanks for that. Haven't changed that yet. I actually have a few spare

. I'm sure I'll find the duff one LOL.

Cheers

geezagillard · Post by **geezagillard** » Sun Mar 01, 2009 5:23 am

Have exactly the same prob at the moment and have swapped just about everything now but the wiring loom and rectifier.

I thought the rectifiers function was to keep the elec current stable? and so had discounted it as a possible problem.

My next thought was to take the head off (SS 300cc) and have it crack tested?

the-elf · Post by **the-elf** » Sun Mar 01, 2009 4:28 pm

geezagillard wrote:Have exactly the same prob at the moment and have swapped just about everything now but the wiring loom and rectifier.

I thought the rectifiers function was to keep the elec current stable? and so had discounted it as a possible problem.

My next thought was to take the head off (SS 300cc) and have it crack tested?

Normally if you've cracked the head or the head gasket has blown it will either leak coolent or pressurise the coolent system. I doubt the head will be cracked.

If the recifier has gone then it can damage the CDI at high revs, resulting in either blowing the unit completly or temperarily screwing it up with the high voltage. Swapping the unit won't help as the next time you rev it the same thing will happen again.

geezagillard · Post by **geezagillard** » Mon Mar 02, 2009 9:53 am

Checked the rectifier today with another healthy KR1S and no difference so maybe I have two blown CDI's...I'm outta ideas...everything has been rebuilt from the ground up including the crank and carbs and I have swapped the various electrical parts out with my spares so I now I will give it to someone and pay out. Beginning to think the crank may have been put back together wrong somehow. If he didn't get the flywheel keyhole lined up according to top dead centre for the stroke maybe the ignition timing is so far out as to be causing these problems. Anyway will endeavour to update if I ever find the problem

Bertie_Mollie · Post by **Bertie_Mollie** » Mon Mar 02, 2009 10:22 am

The problem on mine is NOT CDI as I have tried the one off my "good" bike and there was no difference.

When I get a minute I'm gonna have another play with the carbs. Might try dropping the needles 2 notches with 135 mains and the airbox lid on.

Charles · Post by **Charles** » Mon Mar 02, 2009 10:29 am

Have you checked the condition of the reeds? On my bike some edges were missing, it run awfully.

Bertie_Mollie · Post by **Bertie_Mollie** » Mon Mar 02, 2009 10:32 am

Charles wrote:Have you checked the condition of the reeds? On my bike some edges were missing, it run awfully.

I best check them as well

.

Bertie_Mollie · Post by **Bertie_Mollie** » Tue Mar 03, 2009 3:41 pm

Bertie_Mollie wrote:
Charles wrote:Have you checked the condition of the reeds? On my bike some edges were missing, it run awfully.
I best check them as well .

Reeds checked and no obvious damage or bits missing. Dropped the needles 2 notches while I was in there so I'll see if that makes a difference.

Just got to wait for the rain to stop

.

the-elf · Post by **the-elf** » Wed Mar 04, 2009 12:08 am

Do both exhausts smoke the same amount?

Are there any other problems like the rev counter not working 100% or changes in the condition of the gearbox oil? Any small clue you can give us might help us sort it.

Any idea when the top end was last rebuilt and how many miles has the crank done? The clue is that the engine has had to be jetted down by the previous owner as its running rich but I'm racking my brain over what could cause this.

/edit when you swapped carbs did you swap the needles/throttle slides as well or just changed the actual carb bodies? Its running stupidly rich so maybe it has a pair of completly wrong needles fitted to the carbs? end/edit

Bertie_Mollie · Post by **Bertie_Mollie** » Wed Mar 04, 2009 2:00 pm

OK, let me try and answer some of the questions

Do both exhausts smoke the same amount? - I would say so. Seems a fair bit of smoke but it is even.

Are there any other problems like the rev counter - Rev counter works fine, haven't noticed anything else.

or changes in the condition of the gearbox oil - there is condensation in the oil level window but the oil doesn't look milky. I put this down to the recent damp weather and the bike has been in my shed.

Any idea when the top end was last rebuilt and how many miles has the crank done? - The previous owner didn't give me any information on the engine except he said the pistons had been changed.

The clue is that the engine has had to be jetted down by the previous owner as its running rich but I'm racking my brain over what could cause this. - Someone has suggested to me that a 300cc kit may need to be down jetted. Is this a possibility?

when you swapped carbs did you swap the needles/throttle slides as well or just changed the actual carb bodies? Its running stupidly rich so maybe it has a pair of completly wrong needles fitted to the carbs? - when I swapped the carbs swapped the complete units and did not swap any internals including needles / slides. The needles are 99e.

I have noticed that the airbox lid looks like it may have been repaired to block off a couple of holes in the top. I might have another look at this and see exactly what looks to have been done.

martin · Post by **martin** » Wed Mar 04, 2009 2:15 pm

stan stevens told me all about the jetting when i had my 300cc conversion, he reckons standard pilot jet, needle in the second clip position from the top [standard second from bottom] and standard 135mains and [and maybe one size smaller main jet as there is a possability of the bike running rich at the top end] i am running mine all standard jetting with the 99e needle on the second clip from the top, i like you have had all sorts of problems getting the bike running right, i found that i needed to spend time getting the carbs right, they have to be spot bollock on. also found new coil and new stator made a big difference

wakasaki · Post by **wakasaki** » Wed Mar 04, 2009 3:26 pm

There you Go enough Bed Time
Reading for any Man..
Sounds to me..
Correct me ..
Why is the lid off the airbox..
Answer to make it sound like
its got ashma...No..
Breathing...
So,
more Air = Weak running
Less Air= Rich
Top off...adjust the carbs
fiddles with them so there
so rich to compensate it
runs ok then sputtlers..like its
being strangled it wants to go..But wont..
Has it been Tuned..to run on expansions
has the barrells been tuned..inlet and exhausts
ports..will give this if its set up to be std..
if its all std..
make sure the main jets are clean and immulsion
tubes...
it what the main jet sits in..
it fills with crap..and the main jet
the over fuels...
check the height of the needles
the lift...syncoronized..
new plugs...
then check the air screws..
and put all back together..
if its spluttering under load more
me..i would look at the
plugs
carbs
engine
electrics..
and rule them out as you go..
It may help to see a Doctor after
this or a Marriage guidence councillor
Because ..the poor wifey will be *****
Failing that...just walk away...and leave it..
for a few days..this normally allows
the brain to function properly again...
Where you will go...Yippy i found it..
I knew it was that set of Barrells..
G

wakasaki · Post by **wakasaki** » Wed Mar 04, 2009 3:52 pm

After reading all that..
from start to Finish
is ..if ya get stuck i live in Droitwich
si iam not far..
Also your going on what the
Previous has Said..
BAD MISTAKE..
Quote
"mate..Honest
i aint go the time..
all it needs is a set of plugs..
and the carbs cleaned.."
Ive had the engine done..
so its alright...
i just aint got any time..
Oh really i mean it takes so long
to put a new set of plugs in..
NO IT ISNT......"fffinnnnnnnn"

sound like someone has fooked the ports
heights...
you have tried everything else..
and its made little difference
the Answers are coming back to Over fueling
As you said the airbox lid off..makes it run lean
then you have dropped the main jets
more lean..
try
Putting a set of std carbs on it
cleaned correct size jets
lid on airbox..
no rags stuffed inside..
correct pipes..
cdi and rect you know are right..
if all that..still gives you the same
running problem..
Then ...iam sorry
it s the barrells..or the engine..
Or the Bloke who sold it to you..

Bertie_Mollie · Post by **Bertie_Mollie** » Wed Mar 04, 2009 8:49 pm

Hi Waki,

Here is what I have currently:

Putting a set of std carbs on it - standard carbs fitted
cleaned correct size jets - Done
lid on airbox.. - Done
no rags stuffed inside.. - None fitted
correct pipes.. - Std pipes with swarbrick cans at the mo
cdi and rect you know are right.. - I tried a known CDI no good. Still not tried rectifier

The barrels are an unknown quantity

Will have another play tomorrow and have a look at what was done in the past to the airbox lid.

Cheers

Andrew