Pipe questions... [Archive]

Exciter570

10-31-2006, 10:32 PM

The pipes you got are made by aaen, hauck did make pipes called hauck howlers, but they are race pipes. The pipes you got are for trail riding and will be good pipes. I believe the aaens made an 18hp increase, someone will correct me if I'm wrong.

When running the pipes just make sure you watch your plugs to see how your running, don't get too lean and make sure that you use good fuel.

The next most important thing when running those pipes is to have a good clutch set up, they probably came with a clutching spec sheet, but there are better set ups out there that will yield you more power to the ground. If you are interested, just ask and the clutching gods will chime in.

Have fun with the pipes, they will wake your motor up a bit and there will undoubtably be a big difference in the sound.

3ft

11-01-2006, 07:57 AM

I'll be tuning in a set of Aaen's this winter as well on my V4. I have 0 miles on them, But I hear they are very good trail pipes. Other pipes will yeild higher HP gains(claimed 22 vs. 18).....But can be a bit peaky...the Aaens (from what I hear) have a smoother, wider power band.

THEBIGGUY

11-01-2006, 08:00 AM

Thanks Chris, the sheet I got says to keep the stock clutching, is this a good idea? Or are there other setups that will, as you say, get more power to the ground? I got a jet sheet as well, but the pipe instructions recommends strongly a digital CDI box to complement the pipes. Is this really a necessity? Probably to maximize power...

Exciter570

11-01-2006, 08:36 AM

Hmmm, I'm not sure about the digital CDI box being necessary, but maybe others with Aaen's can wiegh in on this. I run bender quads myself and use the stock CDI.

As far as clutching goes I am surprised that Aaen suggested to keep the stock clutching set up, usually you have to make adjustments in the clutching so that the engine will operate in the new powerband brought on by the pipes. But again, I'm not so familiar with the Aaens so hopefully others running these pipes will jump in.

In any sense you can still adjust your clutching to get more power to the ground regardless. You can do this by switching the stock helix to a more aggressive mutli-angle helix as well as switching out the primary spring to a stiffer spring to help raise your engagement rpm. Those are the two primary things that you would do and you can fine tune with your secondary spring setting and primary weight rivets. It all depends on what kind of riding you do, are you a trail rider, lake racer, etc.. I have an aggressive trail clutch setup in my Vmax4 and it works nice, had the help of another member on the site here get me all set up, I'm sure he'll check in soon enough and give ya some tips as well as others who are running Aaen's and what works for them.

Skinner, don't you run Aaen's???

vmax4rules

11-01-2006, 08:47 AM

If your running a 750cc with Aaen quads, that's probably the reason why they want a CDI upgrade.

Jabber800

11-01-2006, 08:52 AM

I agree with Rules the 750 should have the CDI upgrade but to run stock clutching makes no sense at all!! Look in the Tech pages at the pipe shoot out, those quads on the 750 peak at 9000 RPM.

Exciter570

11-01-2006, 09:08 AM

Then I guess the ? is, are you running a 750 or 800 Vmax4? Sorry, that should have been the first thing I asked you. Things are big time different between the two, especially the clutching. So let us know and more info will flow your way.

THEBIGGUY

11-01-2006, 10:41 AM

Appreciate all the info guys, i have a 94 750. I guess I will be doing alot of aggressive trail riding, and the occasional flat out race of course... geez, I don't really know alot about clutching, guess I'll have to do a bit more homework. Where would I find a CDI box? Any brand better than others? How much HP increase would this give? How much power can I add before I have to, say, get the crank welded and stuff like that?

Skinner

11-01-2006, 10:51 AM

If your going to put those pipes on, you NEED to weld the crank first. Some guys pipe these sleds with out welding and some get away with it,,,,,most don't. That was Yamahas recomendation. If I remember right, the quads run pretty close to stock RPM unless its ported. You probably would'nt need to change the CDI unless you plan on porting. If its ported, I believe you could spin 9000 r's with those AAENS, then you would have to upgrade the CDI. I also think you would want to fire the motor at 180 degrees if you want to run the high rpm with a 750. Exciter570 is on the money, the 800's and 750's are two different animals.

THEBIGGUY

11-01-2006, 01:26 PM

OK, i've heard of the 90 and 180 firing, but I don't know what it means...

Skinner

11-01-2006, 01:33 PM

It means that a stock max fires at 90 degrees which means each cylinder fires alone. When you fire the motor at 180, two pistons fire at the same time so in essence, you now own a big twin. They did this for high rpm 750's because of the crankshaft harmonics. The harmonics were bad to start with, that is why it is so important to weld the gears to the crank. If you don't weld them, even at 90 the chance of the cranks going out of phase is not in your favor

SRV540

11-01-2006, 05:52 PM

yup going to need a cdi upgrade as the stock 750 Cdi has a programmed timing retard in the system wich reduces hp after 8300rpm then @ 8700rpm the rev limiter kicks in!!

THEBIGGUY

11-01-2006, 07:07 PM

Well, it sounds like there is so much that can be done to these motors to get more power... is it all worth it? I mean, where do you stop? I guess you guys have a world of knowledge, and I for sure appreciate all the info, alot better than my local Yammie dealers. Some of them were like, "what do you mean weld the crank?" Wow, i'm sure glad i found you guys... Has anyone ran pipes without welding? What all is involved with welding the crank at 180? Are there any other mods necessary?

dreaming-of-a-v-max-4

11-01-2006, 07:25 PM

when you take your crank out it will come apart in two pieces them two pieces each have a gear on in the center they mesh together when installed forming one crank them gears are pressed on the crank and have a tendacy to twist at high rpm throwing your timing off so what we meen by welding the crank is the two gears in the center weld each of them on to the crank then when you reinstal them if you want to run at 180 instead of lining up the dots on the crankshaft gears you put it together one dot on one side and the other directly across it on the other side but if you do this you need to have a 180 firing cdi anybody please chime in on this if i am wrong later tim

racer7x

11-01-2006, 07:30 PM

Heres a few pics.....

Skinner

11-01-2006, 07:44 PM

Dean, whoever welded those cranks did a nice job!!!!!!!:rockon:

BIG GUY, It never ends. The faster you want to go, the more time, money and research it takes. "Where does it end???? :2dontknow

Tim, I think ya pretty well got er figured out :4fzfk2:

racer7x

11-01-2006, 08:12 PM

the pics are from VVMAXX.....

Exciter570

11-01-2006, 08:24 PM

Once you get it all done, it's worth it, you'll have a big :D on your face as you squeeze the throttle on that baby and FEEL the power of the Vmax4. :3star-war

AL P

11-01-2006, 08:28 PM

I`ve always wondered exactly how they go about welding them, now that I see it, i could do that no problem..not trying to brag or anything like that, cause i`m sure most welders could do it, but, the one thing for sure, would want to know for sure the crank was true before doing it..

AL P

THEBIGGUY

11-01-2006, 10:41 PM

Looks like something to be left to a pro. I'm a farmer welder, I'd hate to try, let alone tear down my engine with only 4600kms on it... hmmmm, does the big gear just slide over the two smaller crank gears? What holds it in place? Are the cranks splined or keyed? I guess I'm just deciding if I should just run it stock for this year, put the pipes and alot else including a welded crank in next year, or try the pipes out this year? Oh the madness.... just curious if anyone runs pipes or mods without welding the cranks?

AL P

11-01-2006, 10:51 PM

there`s quite a few guys on here that run pipes on the 750`s wthout the cranks welded, or going with the 180 crank mod

crank....no key way, there`s only two gears, one on each crank half, the large gear fits over the small gear.

vmax4rules

11-02-2006, 08:16 AM

Has anyone ran pipes without welding?

I ran the low rpm (8350) PSI quads on my 92' 750 for more than 9000 miles with no issues.

THEBIGGUY

11-02-2006, 08:33 AM

Well, I want to thank everyone for their input, definetely worthwhile material to ponder... I just wish I had some useful information for someone. I'll for sure post some pics soon, and let you all know how the pipes work out. I think I'll just try out the pipes this year, take it easy, and next summer I'm gonna get the cranks welded, port and polish, all the fun stuff for next season. Thanks again everyone!!!

Exciter570

11-02-2006, 08:36 AM

I ran the low rpm (8350) PSI quads on my 92' 750 for more than 9000 miles with no issues.

Yeah, but those Aaen's, much like Bender's, need to run at 9000 r's to make their power. Hauck does crank welding for $50 bucks, better to be safe than sorry. I wouldn't chance it, last thing you want is to have to put in a whole new driveline because the crank went and took a crap on ya.

THEBIGGUY

11-02-2006, 08:52 AM

Wow, decisions, decisions...... i'm sure each of you knows what your talkin about, you all have experience in these matters... I definetely want to get more stuff from Hauck, I'd hate to send just the cranks all the way there, and then send the whole engine back next year for porting and a bunch of other stuff... Now I'm getting a bad feeling about running these pipes without welding... sure I say I'll take it easy, but I know what"ll happen, some jackass on an Arctic Cat or something will want to race and get embarassed like they're used to, and I'll run the crap out of my V4 and blow her up. Can't let that happen... I guess it's six of one, half dozen of the other

Exciter570

11-02-2006, 08:59 AM

That is exactly what would happen. I would be the same way, then when it did happen you'd be really pissed at yourself because you knew better.

Maybe wait on the pipes, save up some $ for next season, send your motor in for porting, send your crank in for welding, and send your pipes in for ceramic coating!!! Then you'll be all set!

THEBIGGUY

11-02-2006, 09:09 AM

Does the ceramic coating make a difference?

THEBIGGUY

11-02-2006, 09:12 AM

Wish I knew a reputable Yammie dealer or speed shop up here in Alberta to do the welding and porting and all that stuff... alot easier for me than sending my engine all the way to Hauck, but I guess it's all worth it if they're good at what they do. Hauck's big bore kit makes me drool all over my keyboard...

Exciter570

11-02-2006, 09:18 AM

It's been said that you can gain some power by having them coated, I don't know for sure and if there is a gain I'm sure it's minimal. It will make your pipes look pretty, keep under hood temps cooler by keeping heat in the pipes, and help keep them from rusting.

I agree, that 880cc Big Bore from hauck makes me drool too,...

THEBIGGUY

11-02-2006, 09:24 AM

I'll have to look into the coating... I'm sure I can find a place up here to do it... How's the weather down there?

Exciter570

11-02-2006, 09:38 AM

40* and sunny. The 26" of snow we got earlier this month was gone in a few days, but there is still a lot to be cleaned up around here as far as downed tree's and limbs. Many people have lots of work to do in their homes, flooding was a major problem as sewage pump stations lost power in the storm causing sewage and water runoff to backup into peoples basements n'such. But things are getting back to normal.

Getting back on topic though,..For the coating, check out www.jethot.com you can find some good info on their site. I got a price quote from them a couple years ago and they weren't terribly expensive, I believe they quoted me $75 per pipe.

THEBIGGUY

11-02-2006, 09:45 AM

Cool, thanks eh... wow I even type Canadian...ha ha ha... well, I think I'm gonna put my Vforce reeds in tonight, clean out the carbs, do some general looking over... I think I'll fit my pipes anyway, just get the holes cut in the side panel and see how they fit, got time until the snow flies again. Any intake mods that can be done? What is involved in gutting the airbox? I've seen a few posts that say they've "gutted the airbox" just curious...

jminor

11-02-2006, 10:59 AM

the big guy try fireball coatings they are near toronto.

AL P

11-02-2006, 01:09 PM

what rpm does the paper work you got with the pipes from hauck say these run at?

Skinner

11-02-2006, 01:12 PM

Review the CDI post. Big Guy, you may want to do the same. I have the spec sheets if you want them

THEBIGGUY

11-02-2006, 06:32 PM

Ummm....AAEN says the pipes work best at 8750RPM. Oh, and I missed this part, they say to use a different helix (42-37) in the secondary. I'm dumb.... does it make a huge difference? Ya Skinner, those spec sheets would be great, mucho appreciated...