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Discussion Starter #1 (Edited)
Just finished reassembling my bike after servicing my secondary sheave and installing an orange EPI spring. Went for a short ride to a near by sand pit. All I can say is Wow! The torque in high range is incredible, I need to lay off throttle going up sandy hills cause I'm spinning too much. Spots where I'd bog in 4wd hight range, now I power threw with ease. Incredible difference! Backshift is much improved.

Problem comes from just cruising around. The engine revs way more and it's just loud and annoying now.
The deceleration is also way more aggressive. Rear wheels are always on the verge of locking up when I let of the throttle. That could be dangerous if your not prepare for it. I'm also concerned about ill effects on fuel economy, with all that reving all the time, I'm sure sure my fuel sipping 550 is now going be a pig. Maybe I just need more riding time, but my first impressions were mixed at best.

So what's next? I really don't what to reinstall the original spring as I feel it's too weak for my needs. But the orange spring is better suited for much larger tires , or hardcore mudding . Think I need an in between stock and the orange spring. Maybe I have other options to consider then just changing the spring again.

Any advise or insight would be appreciated. Thank you
 

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You really don't have any other choice on springs. Might be able to find some other supplier with a spring in between the orange and blue.
What roller weights are you running? By your sig they must be stock. Upping to 18's might help with the cruising rpm's.
 
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Discussion Starter #3
They are the stock weights. I was thinking exactly that, getten some 18g weights.
 

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When I put my JBS sheave and purple secondary spring in my 700, I had the same issue. I originally went with 18g weights and I hated the extra revs while cruising. The bike seemed like it was revved past the best spot in the torque curve when I would get on the gas. I bumped up to 20g weights and now I'm very pleased with how it performs. In the end, I wish I had just stayed with a shim mod and left it alone. I'd have saved some money.
 
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Discussion Starter #5
Ordered some 660 weights (5km-17632-00) x8
Hope in mellows things out.
 

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Discussion Starter #7
26x9 front 26x11 rear Mudlite XTRs
 

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Looking through some spring info. If you can find a Dalton pink. That spring has more/ better force at the installed lengths that the stock 550 but less that the EPI orange.
 

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Discussion Starter #9
Can't find much info about it. It's not even listed in the Dalton website.
Only found this and seems to be equivalent to stock.
 

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Discussion Starter #10 (Edited)
Just got back from a good 20 mile ride.
Did some tight technical rough twisty trails, to crossing swamps and rivers ( quad almost got swept away) to some mild speed trail cruising, and hight speed logging road cruising. Had my cheap digital tachometer to observe the differences in revs.

For rought, tight technical stuff this set up it perfect. Climbing steep hills and crossing swamps is awsome to.You always have plenty of torque on the demand in high range. So that's positive

The issue as mention before is cruising. I've gain around 500 rpms across my cruising range. These number are all approximate and in high range 2wd.

15mph = 4000rpms
20mph = 4600rpms
30mph = 5700rpms
40mph = 6100rpms
50mph = 6500rpms

So ya cruising around sucks. It's like I lost my overdrive and now I'm stuck in plain drive all the time. But all is not lost. I feel confident that 18 g weights will make all the difference and get this set up working perfectly. Nothing ventured, nothing gained.
 

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When you need new tires throw some 27 or 28 inch on should help with the cruising rpm plus more ground clearance a win win in my book.
 

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Discussion Starter #12 (Edited)
Got back from our Canadian capital yesterday.
Took a longer detour to pick up my new 18g weights. Even though I was exhausted from a long day of travelling I pushed threw and manage to install the new weights in 90 min. Went for a quick ride to play in my near by sand pit yesterday , and today I went for a much longer ride to test everything out.


I'm very pleased and excited to say that everything turned out awsome! My rpms droped by 500 rpms threw out the cruising range. l have excellent back shift, and more pull then my stock spring ever managed. It's really surprising what a well set up little 550 can do. Even gained almost 3 mph on the top end witch was unexpected. While I was at it I also installed a new freshly oiled air filter.

Loaded up a few pix just for fun.
 

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Discussion Starter #13 (Edited)
Going to be doing more riding today. I want to do a bit more testing of various terrains that I've often ridden before the spring and weight mods. I'm also going to be monitoring fuel economy closely. Hopefully I haven't sacrificed too much mpg with this set up.
 

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Hey...Vincent..Glad you are finding something you like.

The 2011 griz 450 ships with 14g weights. That thing rev'ed horribly. I install 16's in it. Made it a much more ridable machine.

I run 20's in my 700 griz with my franken shaved sheave. Stockers are close to 22g's. I liked that set up plenty of low end and no top end loss.

Yesterday getting my Kodi ready for S Dakota. I decided to finally degreeeeeasssse it and take out the 30's weights that it ships with. Installed some 20g weights. Will test it out today. I wanted to measure the secondary spring force but ran out of time..didn't even look at it. I'm speculating that it is the same as the Griz 700. Anyone know or heard of the force on the Kodi spring.
 
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Discussion Starter #15 (Edited)
Hey...Vincent..Glad you are finding something you like.

The 2011 griz 450 ships with 14g weights. That thing rev'ed horribly. I install 16's in it. Made it a much more ridable machine.

I run 20's in my 700 griz with my franken shaved sheave. Stockers are close to 22g's. I liked that set up plenty of low end and no top end loss.

Yesterday getting my Kodi ready for S Dakota. I decided to finally degreeeeeasssse it and take out the 30's weights that it ships with. Installed some 20g weights. Will test it out today. I wanted to measure the secondary spring force but ran out of time..didn't even look at it. I'm speculating that it is the same as the Griz 700. Anyone know or heard of the force on the Kodi spring.
Thanks for sharing some of your experience and info on your set ups. I'd appreciate hearing more updates on your 700 Kodiak's progress. Heck just post it here. We'll just guess and say that your secondary spring is simular to an EPI orange as to stay on topic. :wink2:
 
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Discussion Starter #16 (Edited)
Went for my morning ride, the first 10 miles were terrible rough and slow, climbing steep hills, tight trails, over logs, bolders, threw swamps etc....all in low range, average speed was only 3 to 6 mph

Next 10 miles was moderately rough at time but overall better trails. High range with speeds of 15 to 25 mph

The last 10 miles were logging roads in reasonably good condition. Speeds were 30 to 40 mph

Total mileage was 29.6 miles and used
1.25 gallons of gas so that's an average of
23.7 Mpg.

Converted to metric is 47kms using 4.7 L
Witch is 10 L for 100kms.

That's reasonable fuel economy considering the first 10 miles of driving kinda sucks. I can easily live with that. Mite even try only driving on the smooth trails for one ride just to see what it's best mileage can be.
 

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Hey...Vincent..Glad you are finding something you like.

The 2011 griz 450 ships with 14g weights. That thing rev'ed horribly. I install 16's in it. Made it a much more ridable machine.

I run 20's in my 700 griz with my franken shaved sheave. Stockers are close to 22g's. I liked that set up plenty of low end and no top end loss.

Yesterday getting my Kodi ready for S Dakota. I decided to finally degreeeeeasssse it and take out the 30's weights that it ships with. Installed some 20g weights. Will test it out today. I wanted to measure the secondary spring force but ran out of time..didn't even look at it. I'm speculating that it is the same as the Griz 700. Anyone know or heard of the force on the Kodi spring.
I'd be very interested to hear your results with the weight change. I'm interested in doing the same on my Kodiak.

Sent from my Pixel XL using Tapatalk
 

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Discussion Starter #18 (Edited)
Racked up 600 kms threw all kinds of terrain since the orange spring and heavier weights were added. Everything holding up well with an average of 10L / 100kms ( near 24 US mpg) fuel economy, with an aggressive driving style.

I've read on the official clutching thread that heavier weights won't gain top speed. Well here is a comparison using the speedo for reference.

Stock 16g weights and spring, no shims
100km/h (62mph)

Stock weights and spring +1.5mm shim
91km/h (56mph)

Stock weights, EPI orange spring + 1.5 mm shims
88km/h (54mph)

18g weights, EPI orange spring + 1.5 mm shims
95km/h (59mph)

Thought it was worth sharing.
 
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Great info vincent....I went from 30g weights in my Kodiak to 18g weights with purple epi spring.. night and day power. No longer have to use low range in the mud.like stated above the revs are high when cruising. I'm waiting for my sheave to get back from getting milled and going to install 20g weights. With the purple spring the back tires are right on the verge of locking up going down hill in 2wd. Only down fall is bad mpgs
 

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Thanks Vincent...
The slower top ends are a result of the shims which you already know.
Lighter weights use more HP for the CVT to shift completely out. Heavier springs use more HP for the CVT completely shift out.
Adding the spring makes it harder for the engine to hold the top speed.
Adding the heavier weights make it easier for the engine to hold the higher rpms that maybe out of the optimal torque range. Once the CVT is shifted completely out it's all up to the ponies to take you to the higher top speeds.
 
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