running rough

[stormingjoe]

Did you change your pilot jets, you'll need bigger ones.
Check the carb clamps are tight.
From what I remember when researching, Dynojet sizes are different, as are Factory Pro to standard jets, 190 is different in each category, do remember seeing a list somewhere but can't find it, you may have fitted a smaller one than standard.
Just a thought.

[thumperslaw]

All. Checked they don't leak. Running 190 jets which are not blocked
Checked choke cable and seems to be smooth

One thing I do know is when on choke it stays high on the rpm then it will die off thrn go high again

[thumperslaw]

Little update to the crap running of my vtr!

Took alarm off tonight ( unwired from the main loom) and changed the emulsion tubes (yes the right set up)
Blanced carbs and sort the air/fuel mix out also
Took it for a test ride down the road and it's still doing it

Starting to bug me know as it's costing more and more money trying things!

What i need to know is the hole where the slide needle goes in to can they be got on there own? as mine (on both sets of carbs) have ovel shaped now

[Wicky]

Is your airbox standard as it's very temperamental to any changes however minor.

Plugs you say you checked but are they right ones, or for the cost of new uns consider bunging a pair in.

Was it running right before you did the engine transplant or did you buy it as a nonrunner?

[thumperslaw]

Plugs are the right ones.
Bike always ran fine with last motors that I had in it. Just this one. Can't see it beening the engine tho

[thumperslaw]

Air box is standard nothing changed

[tony.mon]

Yes, you can get spare needle jets.
They cost pennies, might as well get Honda ones form David silvers.

[thumperslaw]

Going to speak to dyno jet and get some needles from then

[sirch345]

Bike always ran fine with last motors that I had in it. Just this one. Can't see it beening the engine tho

So the bike ran fine with the last motor, was that with standard carbs (no jet changes) and a standard air filter as there have been quite a few in the past who've had problems when trying to use a K&N air filter. If that is the case try the old air filter, OK it will run rich with the bigger main jets, but just see if the problem is still the same.

What about the TPS have you checked that

Chris.

[lloydie]

Going to speak to dyno jet and get some needles from then

I have a set of dyno jet needles in my spare carbs pm me if you want them


Sorry officer
The voices made me do it

[AMCQ46]

If the problem was not there when the carbs were runon the old engine, I would still have to point at the new engine, or something that was dislodged during the rebuild, not the carbs.

You said you checked the cam timing in an earlier post, but did you follow the instruction from the workshop section, or the Haynes manual?...could you have it timed 180 deg out?

Did the new engine have vacumn take off fitted to the front cyl?, is it sitting open ?

[thumperslaw]

Cam timing is spot on as I did set it how manual said.
I never done the end rebuild as I brought it already done.

Will check the vaccum line again to be sure.

[MacV2]

Cam timing is spot on as I did set it how manual said.
I never done the end rebuild as I brought it already done.

Will check the vaccum line again to be sure.

If you followed the 'manual' was this the Haynes manual?

If so it has been noticed that this is actually wrong & It is recommended that you follow the sticky in the workshop section instead as suggested by AMCQ46.

Re the vacuum. The rear should be connected to the fuel tap, the front either plugged with a bolt as standard or fitted with a take off for carb balancing.

Mac

[AMCQ46]

That is where I was going Mac, if you follow Haynes manual, you will be timed 180 degrees out and that gives the bike a problem revving out.

Thumperslaw, It is worth a check to make sure this isn't the issue

[thumperslaw]

That is where I was going Mac, if you follow Haynes manual, you will be timed 180 degrees out and that gives the bike a problem revving out.

Thumperslaw, It is worth a check to make sure this isn't the issue

Thanks for the info guys.

Was timed from a Honda work shop manual.
Am going to check timing again tho.

190 jets and it does not pop and bang so much when you let the throttle off.
180 jets and its like a fire work display