Carb photos, not bad looking.

[surferdude]

Here are photos of the carbs:






The tank only has a little bit in the reserve tank and it doesn't smell foul - I might have an easier time than I thought getting it running again. I will have to read through the service manual about how to remove the carbs and then tear them down to start cleaning.

[drinmotoracer]

Hey hey... not too shabby at all so far. However, thing might get nasty when you pull the jets. All in all your bike is coming along quite nicely! I think you are making the right choice going with the 600RR front end. It will only cost probably $100 more than a complete F2 front end and you get a really nice braking system, much better suspension, and good tire choices.
Keep us all updated!

[kip]

Nice snag on this bike. It looks like a great deal to me. I love the look of those carbs. Do you know anything about the history? Have they been ported? All of the stock ones I seen have a square edge at the inlet. I saw some like these on ebay several months ago. Also has the notch cut out on the slides, stock ones are flat on the bottom. As far as the rebuild goes, take everything I say with a grain of salt since I screwed mine up on the first rebuild and am doing it again now, but here are some things I learned.

The carb intakes boots get hard over time, buy new ones if yours are original. Hord has them cheap. Makes taking the off and putting them on a lot easier.

If you are going to dip them in carb cleaner, don't forget *all* of the plastic/rubber stuff. The ones that got me are the rubber washers on the end of the pilot screws.

Also you can disconnect the throttle cables using a couple of screws on the side of the carb.

There are many other "carb" threads in here that may help.

good luck.

[surferdude]

Hey hey... not too shabby at all so far. However, thing might get nasty when you pull the jets. All in all your bike is coming along quite nicely! I think you are making the right choice going with the 600RR front end. It will only cost probably $100 more than a complete F2 front end and you get a really nice braking system, much better suspension, and good tire choices.
Keep us all updated!

I'm was thinking about putting the tank back on with some fresh fuel after recharging the battery to see if it'll start but found out the nuts for the studs to bolt on the stock exhaust are missing! I will just have get back to cleaning up the carbs.

I'm still hemming and hawing over which way to go with the front end. I lost out on a mint '07 RR front end earlier today while I was debating about the BIN but have found a nice '03 front end minus the front wheel and rotors. I have also located just about everything I need for the F2 setup except for all of the bolts and nuts to put it together.

So many choices and I'm playing catch up with trying to learn what I can do to mod the bike.

[surferdude]

Nice snag on this bike. It looks like a great deal to me. I love the look of those carbs. Do you know anything about the history? Have they been ported? All of the stock ones I seen have a square edge at the inlet. I saw some like these on ebay several months ago. Also has the notch cut out on the slides, stock ones are flat on the bottom. As far as the rebuild goes, take everything I say with a grain of salt since I screwed mine up on the first rebuild and am doing it again now, but here are some things I learned.

The carb intakes boots get hard over time, buy new ones if yours are original. Hord has them cheap. Makes taking the off and putting them on a lot easier.

If you are going to dip them in carb cleaner, don't forget *all* of the plastic/rubber stuff. The ones that got me are the rubber washers on the end of the pilot screws.

Also you can disconnect the throttle cables using a couple of screws on the side of the carb.

There are many other "carb" threads in here that may help.

good luck.

They don't look stock? Hmmm, the seller made no mention about the carbs being ported or modified but the bike was raced for awhile. I found the previous owner's contact information and will be giving him a call to get the facts about what was done to the bike and when the work was done.

I ordered new carb boots from JD - figured it was a good idea to replace them. I still need to figure out how to get the choke valves out without losing them (page 4-5) as well as disconnecting the throttle cables - I know absolutely nothing about carbs or working on them.

[kip]

The hawk was my first carb rebuild too. With the choke valves you can just set the choke lever on the hand control to "on" and unscrew them. Mine were pretty gunked up so it took a little tug to get the plungers out the first time. They are a lot easier to get out if you pull the carbs off the boots first. Just easier to get too.

I am no expert on hawk carbs. All the ones I have seen are more square at the inlet. Honda may have made some other variants. I am sure someone in here will know. To me those look stock but ported and with modified or different (maybe rc30 slides). Seems like these would make them flow better, but I don't know really. Here is a pic of my partially disassembled carbs from an 88. Notice the squared off inlet area. The slides are flat on the bottom, although that is hard to see in this pic.

[DefTrap]

I've got at least 4 pairs of Bros / NTV carbs knocking around. All of them are square at the inlet end. If that's a mod, someone's made a good looking job of it.

[surferdude]

Now I can see where they've been "massaged" - interesting!

[nt650hawk]

Yea, it looks like someone spent some time modifying the intake to replicate a smooth velocity stack. NICE WORK. I may have Pops see what he can do with the lathe or CNC. I don't know how he would clamp it down. I'm sure he might be able to find a way.

[surferdude]

Yea, it looks like someone spent some time modifying the intake to replicate a smooth velocity stack. NICE WORK. I may have Pops see what he can do with the lathe or CNC. I don't know how he would clamp it down. I'm sure he might be able to find a way.

When I pulled the filters off, and saw the carb throats the first thing that popped into my head was - those look like velocity stacks - but didn't realize they had been ported. Shows you what I know about carbs!!!

Nada!!!

[Doc]

If they did that to the carbs I wonder what other goodies lie in there.

[kip]

surferdude here is a little more info on the choke valves...

The choke valves unscrew with a 10mm wrench on the plastic nut thing you can see in the pics. Take the carbs off the boots before you take the choke valves out. Just makes it easier to get too and see. After you get them unscrewed the choke plunger/valve will just pull out. The manual says you should have the choke lever "on" to avoid losing the spring retainer, but I pull them out either way. I don't think it matters. Mine were originally kindof gunked up so they took a tug on the cable to get them out. Also, you can separate the cables for each choke at the "join" point by moving the rubber gasket around them and the cables can disconnect. This isn't necessary, but helps if you want to push and pull each individual cable. I did that to see how much friction was in the housing, in my case it was bad enough the springs did not pull the cables back.

Here is what it looks like out of the carb.


Here is with the plunger and spring disconnected from the cable.

[Deadlego]

be care full not to shoot them. They can hard to find then you got to clean them after you find them...... I learned this the hard way

[surferdude]

Hey Kip,

That was the ticket! Taking the carbs off of the boots was by far the hardest part - man, they were stuck on there. The choke valves were very easy to handle with the carbs loose.

Thanks,

Derek

[kip]

Cool. Glad to help ... where I can. At this rate you are going to have yours back together before I do. Let us know how the rest of the rebuild goes. That 700 is going to rip.