Airbox to get to vacuum point

[bingo808]

Hi
Is there a way to access the front carby vacuum point to balance the carbs without removing the airbox? Or should I remove it to get to the vacuum port?

[bingo808]

I've just removed the airbox and can see the vacuum screw.

Is it an allen key job or something else? If I can't get to it I'll just balance the carbs by sound. Any thoughts on that approach?

[bingo808]

Is this what I'm trying to remove?



Won't budge using a flexible extension on 4mm allen key head.

[MacV2]

Soak it in Plus Gas & try again...

Done a few from the side without removing air box, fiddly but doable...

It's probably just seized.

[mjvw]

http://vtr1000.org/phpBB3/viewtopic.php ... d2#p455678

I managed to remove mine using a quarter inc drive and one of them 360 type socket heads was a little tight only small turns to remove but was completed without removing airbox, fitted brass take off attached vac pipe then blanked off in under seat, so no hassle doing carb balancing.
I did use pentrating spray and the engine was still warm.

[bingo808]

Well, I managed to get that grub screw out.

Is there any trick to screwing in the M5 barb/brass take off? I need smaller fingers!

There is a clamp head getting in the way. May need to move that first.

[bingo808]

FINALLY got the brass tap screw into the thread. I used a small length of vacuum hose to hold the tap and twist it in.

Honda part used below.

[mjvw]

Great news, make sure you put a strong clip at adaptor/hose if your leaving it permently fixed,when i did mine first time its slipped off and bike started running rough so but a really strong clip on pipe.
Once its all fitted its great just doing carb balancing without having to mess around.

[sirch345]

FINALLY got the brass tap screw into the thread. I used a small length of vacuum hose to hold the tap and twist it in.

Honda part used below.

Well done

Chris.

[bingo808]

Hooked my vacuum gauges up and started the bike.

The gauge needles fluctuate wildly at idle. Do I need to open the throttle to smooth things out?

If so, I might need a helping hand from a mate.



EDIT: What I'm missing is a valve to act as a dampening tool. See pic below.

The grey parts are the dampeners. Will fit and try again.

[mjvw]

The dampers should help. My set up uses carbtune carb sync unit I have put link to PDF further down damping is discussed.

//uploads.tapatalk-cdn.com/files- ... une-ii.pdf

[8541Hawk]

EDIT: What I'm missing is a valve to act as a dampening tool. See pic below.

The grey parts are the dampeners. Will fit and try again.

Instead of buying a valve, what I do with my sync gauge is run a set of pilot jets in the lines. The size isn't critical, I run whatever I have around. I believe I have 38s in there right now

[bingo808]

Thanks for your replies guys.

Well, I added the damping valves, and I think I've busted one gauge as it doesn't read zero with no vacuum.



That'll teach me! No problem, I will source another gauge and refit. You live, you learn.

Stay tuned!

[lloydie]

Just use one . Takes a little longer but will work

[mjvw]

EDIT: What I'm missing is a valve to act as a dampening tool. See pic below.

The grey parts are the dampeners. Will fit and try again.

Instead of buying a valve, what I do with my sync gauge is run a set of pilot jets in the lines. The size isn't critical, I run whatever I have around. I believe I have 38s in there right now

Love that tip What could idea.