2001 Raptor 660R Question!!!!

[rsheppick]

Hey All,

My Raptor listed in my signature needs to have some motor mods done now. I've ordered from Dennis Kirk a Statge2 Hot Cams. I contacted South Valley Motorsports and asked their service department what the cost of such an item would be to have installed. They said 125 to have it installed; however, they also said that they would need to send the head or whatever off to Lindsay Machinery to have something done with the valves because the bigger cam would cause problems with the valves.

I noticed on Dennis Kirk they said there was some recommended valve spring kit for this Cam. It was 164 dollars Or I’m looking at a few hundred to have my stock ones fixed for this bigger cam. Then I got thinking if they already had it apart and had the motor at a machine company why not port and polish while it was in there. The guy then went on to tell me I would need bigger carbs for this :

As you guys know 2fun and the crew here in Utah. I'm new at this stuff and I want to get the raptor a nice spruce up so it doesn't feel so dog slow compared to other Raptors. Is all of this work really needed what are the pros/cons of having these valves totally replaced. Why didn't Honda/Suzuki do that with my TRX450R it didn't say the valves needed anything done to them. Is that just because it is a Dirt Bike motor?

Please help make this decision so I can correctly spend the money to make the Raptor better. I feel I’m at the end of the line when it comes to Bolton's.

Ronnie


P.S Here is the Cam I ordered notice the site notes on the Valve Springs.

[Only registered and activated users can see links. ]

Here Is The Valve Springs They Say I Need

[Only registered and activated users can see links. ]

[2fun]

Originally Posted by rsheppick

Hey All,

My Raptor listed in my signature needs to have some motor mods done now. I've ordered from Dennis Kirk a Statge2 Hot Cams. I contacted South Valley Motorsports and asked their service department what the cost of such an item would be to have installed. They said 125 to have it installed; however, they also said that they would need to send the head or whatever off to Lindsay Machinery to have something done with the valves because the bigger cam would cause problems with the valves.

I noticed on Dennis Kirk they said there was some recommended valve spring kit for this Cam. It was 164 dollars Or I’m looking at a few hundred to have my stock ones fixed for this bigger cam. Then I got thinking if they already had it apart and had the motor at a machine company why not port and polish while it was in there. The guy then went on to tell me I would need bigger carbs for this :

As you guys know 2fun and the crew here in Utah. I'm new at this stuff and I want to get the raptor a nice spruce up so it doesn't feel so dog slow compared to other Raptors. Is all of this work really needed what are the pros/cons of having these valves totally replaced. Why didn't Honda/Suzuki do that with my TRX450R it didn't say the valves needed anything done to them. Is that just because it is a Dirt Bike motor?

Please help make this decision so I can correctly spend the money to make the Raptor better. I feel I’m at the end of the line when it comes to Bolton's.

Ronnie


P.S Here is the Cam I ordered notice the site notes on the Valve Springs.

[Only registered and activated users can see links. ]

Here Is The Valve Springs They Say I Need

[Only registered and activated users can see links. ]

I don't know about the valves on the Raptor, but you can't really compare it to the 450R. They are completely differen't machines. The YFZ and 450R are extremely high performance, high strung race machines.

The Raptor needs quite a bit in order to compete with the HP and quickness of the other two. If you can afford to get the head ported, you may want to do this while it is apart.

I will let the other guys chime in as I don't own a Raptor, but I DO know that much work will be needed to make it competetive against the newer 450's.

[rsheppick]

Originally Posted by 2fun

I don't know about the valves on the Raptor, but you can't really compare it to the 450R. They are completely differen't machines. The YFZ and 450R are extremely high performance, high strung race machines.

The Raptor needs quite a bit in order to compete with the HP and quickness of the other two. If you can afford to get the head ported, you may want to do this while it is apart.

I will let the other guys chime in as I don't own a Raptor, but I DO know that much work will be needed to make it competetive against the newer 450's.

2fun,

I agree I contacted Plaza Cycle. They told me that you wouldn't want to go into something like this saying that the valves need to be replaced and such. That if they are in within a limit the cam can be dropped in. They however said they would recomend since I've got it in to have a high compression piston put in that if it is also within a limit i can just have them drop it in but if it isn't then I would need to send it out for service.

I want it to compete against other Raptors/Preditors. Basicly I want to crush these people at the dunes running only bolton's if you get my drift. I know that I can do a little more work to my 450 and it would go even faster. Just as of yet it is so fun to drive I don't wanna do much more to it. On a side note I think the valves need to be adjusted anyways so I figured what the heck a few hundered dollars I can have them put in a bigger cam look at the internals of the motor and rejet it with my DynoJets and be set.

Any Ideas?

[2fun]

"Crush them with "bolt-on" parts" eh??? LOL!!
I don't think they'd believe you only had "bolt-ons"

Ever thought about going with a 686 kit??
Now THOSE are fast!

You will however start running into reliability issues the more you build it.

[rsheppick]

Originally Posted by 2fun

"Crush them with "bolt-on" parts" eh??? LOL!!
I don't think they'd believe you only had "bolt-ons"

Ever thought about going with a 686 kit??
Now THOSE are fast!

You will however start running into reliability issues the more you build it.

The problem behind that 686 kit is that the motor needs to be for sure sent out to have it rebored or whatever. They also said once you start doing those types of things reliability goes out the window and you will start having problems.

BTW

What do you mean by "I don't think they'd believe you only had "bolt-ons" " My Raptor is fast and it has one its fair share of races even against better built Raptors.

Ronnie

[Woody_YZF]

If you're going to do all that (port, polish, etc.), I think you need to go big bore. I don't know anything about the valves deal, but it sort of makes sense. I would put a higher compression piston in it though. My bro put a 10.5:1 in his and it woke it up quite a bit and reliability shouldn't suffer much if any.

[2fun]

Originally Posted by rsheppick

What do you mean by "I don't think they'd believe you only had "bolt-ons" " My Raptor is fast and it has one its fair share of races even against better built Raptors.

Ronnie

Sorry, I misread your post. I thought you were wanting to "crush" the newer 450's with bolt-ons.......

[rsheppick]

Originally Posted by Woody_YFZ

If you're going to do all that (port, polish, etc.), I think you need to go big bore. I don't know anything about the valves deal, but it sort of makes sense. I would put a higher compression piston in it though. My bro put a 10.5:1 in his and it woke it up quite a bit and reliability shouldn't suffer much if any.

They had told me they had best luck with 686 kits. who makes that kit

[ktyfz]

Rsheppick I'll call my dad this afternoon and talk to him about what your doing to see what he thinks. Like I've mentioned before he owns an engine machine shop in St. George and does a lot of work on quads. He was just telling me about a 690 Raptor that they've been working on that is putting out 60HP. I'll see what he thinks about you needing different valves for the cams and if you need bigger carbs with a port & polish. I know for a fact that the 690 Raptor he's been working on has been port and polished, but no sure if it has different carbs. I'll get back to you...

[rsheppick]

Originally Posted by Crunk

Rsheppick I'll call my dad this afternoon and talk to him about what your doing to see what he thinks. Like I've mentioned before he owns an engine machine shop in St. George and does a lot of work on quads. He was just telling me about a 690 Raptor that they've been working on that is putting out 60HP. I'll see what he thinks about you needing different valves for the cams and if you need bigger carbs with a port & polish. I know for a fact that the 690 Raptor he's been working on has been port and polished, but no sure if it has different carbs. I'll get back to you...

Awsome, that will be good infomation for me. It is hard to know who is trying to just make money off of you and who is really trying to help.

Ronnie

[Woody_YZF]

I'm also under the impression that the 686 kit is where it's at. Not sure who makes them though. Just for the record, I'm all about making money.

[rsheppick]

Originally Posted by Woody_YFZ

I'm also under the impression that the 686 kit is where it's at. Not sure who makes them though. Just for the record, I'm all about making money.

I also hear that 686 kit is where it is at. I just need to get this valve and spring question answered. Rocky Mountain also says that I need this 150 dollar set of springs and collers or whatever they are for this cam.

[ktyfz]

Ok I called and talked to my dad about your quad and what the stealership is telling you. When installing the stage2 cams he said you should really get heavy duty valve springs installed and your valves will need to be adjusted for the new cams. He said that most likely the dealership does not have the tools to change the valves springs and is the reason why they want to send the head to Lindsay's. This is typically what the dealerships down in St. George do with him .. send the heads to his machine shop in St. George to have the valves changed, etc. He also said that you should find out if they're thinking of putting in bigger valves or just changing the valve springs. For a stock bore Raptor there isn't any reason to go with bigger valves, but if you go to a 686 kit then you'd definetly need bigger valves.

As for the port & polish and needing bigger carbs he said that their isn't any reason for you to need bigger carbs with just a port & polish - just need to rejet the stock carbs. He told me that the 690 Raptor they're working on is running the stock carbs.

He also recommended that if your really serious about getting a 686 kit installed in your Raptor that you should give Troy at Pure Evil (he's located in St. George) a call about having them do the work for you. Pure Evil builds hi performance ATVs. Pure Evil us to be located in Las Vegas, but moved their business to St. George. I've seen some pretty fast quads come out of Pure Evil. My YFZ is at Pure Evil right now getting ready to hit the dyno! After the dyno run it's gonna be getting a port & polish job done

[rsheppick]

Originally Posted by Crunk

Ok I called and talked to my dad about your quad and what the stealership is telling you. When installing the stage2 cams he said you should really get heavy duty valve springs installed and your valves will need to be adjusted for the new cams. He said that most likely the dealership does not have the tools to change the valves springs and is the reason why they want to send the head to Lindsay's. This is typically what the dealerships down in St. George do with him .. send the heads to his machine shop in St. George to have the valves changed, etc. He also said that you should find out if they're thinking of putting in bigger valves or just changing the valve springs. For a stock bore Raptor there isn't any reason to go with bigger valves, but if you go to a 686 kit then you'd definetly need bigger valves.

As for the port & polish and needing bigger carbs he said that their isn't any reason for you to need bigger carbs with just a port & polish - just need to rejet the stock carbs. He told me that the 690 Raptor they're working on is running the stock carbs.

He also recommended that if your really serious about getting a 686 kit installed in your Raptor that you should give Troy at Pure Evil (he's located in St. George) a call about having them do the work for you. Pure Evil builds hi performance ATVs. Pure Evil us to be located in Las Vegas, but moved their business to St. George. I've seen some pretty fast quads come out of Pure Evil. My YFZ is at Pure Evil right now getting ready to hit the dyno! After the dyno run it's gonna be getting a port & polish job done

Crunk,

I just ran into 650 dollars to get the work started now.

I've got the Stage 2 Hot Cam, and these [Only registered and activated users can see links. ] from there I'm trying to decide if I should just go ahead and have them port and polish which I think I might but then the 686 kit requires the motor to be bored to allow the new piston correct?

If I wanted to run a high compression piston or something I found a Wesco 102MM Hi Comp Piston at Dennis Kirk.

The piston part is what I'm confused ont he most help me here

[rsheppick]

Would this piston be the one that I want?

[Only registered and activated users can see links. ]

[ktyfz]

Originally Posted by rsheppick

Crunk,

I just ran into 650 dollars to get the work started now.

I've got the Stage 2 Hot Cam, and these [Only registered and activated users can see links. ] from there I'm trying to decide if I should just go ahead and have them port and polish which I think I might but then the 686 kit requires the motor to be bored to allow the new piston correct?

If I wanted to run a high compression piston or something I found a Wesco 102MM Hi Comp Piston at Dennis Kirk.

The piston part is what I'm confused ont he most help me here

I wish I ran into some money . Yes the 686 kit will require that the cylinder is bored and it may need to be sleeved, but I'm not sure on that. You'd also need bigger valves installed with the 686 kit.

[ktyfz]

Originally Posted by rsheppick

Would this piston be the one that I want?

[Only registered and activated users can see links. ]

That piston is for a .50 over stock bore, so if you haven't had your cylinder bored/honed at all then that is not the right piston. If your just planning on chaning your stock piston to a hi-comp piston without doing any machine work then this is the [Only registered and activated users can see links. ] you want to get.

[rsheppick]

I don't mind to have the machine shop do that stuff. I just want to get the parts from Rockymountain if possible. I hate waiting around for Dennis Kirk.


What would .50 over stock do for me? How does one come up with a 686Kit?

[Woody_YZF]

If you have your machine work done at Lindsays, they are the distributor for all of Utah on Wiseco pistons and I would have them recommend and get the piston you need. I need to stop reading these threads about you people putting all this money into your quads. It makes my wallet hurt just thinking about it.

[rsheppick]

Originally Posted by Woody_YFZ

If you have your machine work done at Lindsays, they are the distributor for all of Utah on Wiseco pistons and I would have them recommend and get the piston you need. I need to stop reading these threads about you people putting all this money into your quads. It makes my wallet hurt just thinking about it.

AHHHH well then. I might just have Plaza take it apart and I'll take the head over to them and tell them to hook me up. How does one come up with the 686 kit thou. Is it just a Wiseco piston that is .50 over bore?