Dogpoundracing
New member
what secondary spring ? i have a 780 bb have moved up in the helix from a 47/43 to a 53/45 my rpms with the 47 were at 8400 then climbed im running hauck pipes with growlers that call for 9000-9200 rpms im up to 23-40 for gears and have over drive wondering if i should keep gears or go taller also stock drivers and 1 inch ripsaw 144 picks only running 90mph on gps .feeling i should be higher then this in 2000ft .i know im down on rpms but not sure if i should drop weight on tip or continue with the helix swap and gears motor is strong powwervalves clean running little on the rich side but plugs look great .
any help would be gret trying to punch 110 on lake hard pack
any help would be gret trying to punch 110 on lake hard pack
Hi: Did you change your CDI box? If this is an SRX you are refering to the stock CDI retards pretty quick after 8400-8500RPM. Hauck sells the proper CDI to match their pipes. I trust you have called Haucks tech line...I find them very helpful especially when you talk to Pat. 90 is way too slow for this sled.
Dogpoundracing
New member
i have haucks cdi ,boost bottle ,bored carbs ,race ported running 110fuel pre mix /big bore pipes/compression is great checked pvs and adjusted them today ,i need to be up around 8700 to make hp i know that had a problem with the secondary binding because a dalton red wrapped to 60 was to long i think its all in my clutching but have tryed numerous weights and either im at 9200 or way under which i am now numerous springs ,gears etc.if i could get it over 110 id be happy .which for this machine doesnt seem to hard
Sounds like you've got all the right stuff! That sled should do over 110mph easy! I use Thundrershift or Heavy Hitters on pretty well all my sleds, I like the 53/45 Helix and would use the Yamaha Green Secondary Spring, I find the "Speed Ring" over drive primary slower on top then the Standard primary. Your present gearing would be good for @ 110 if you can get your RPM's up, I myself would run 23/38. You may want to try different primary springs to get your RPM's up. Just my 2 cents...my 1 1/4 - 144",long travel 2002 SRX, with reverse runs over 100mph[GPS] on hard pack without any problem...my 1999 SX 700 Trail Mod[when it had a 121" track] did a best of 116mph all on GPS. VMAX4 Mod REAL FAST
Dogpoundracing
New member
i will try that .. i have one have been getting into pulling my hair out just trying to break 100 the guys i ride ride with are just over 103 on there dream meters i know i can top that if i get this thing hooked up .
no1chevyboy
New member
take magic marker and put line on primary sheave from center out and make sure belt is traveling all the way (belt will ware line off in travel area)
saphssupra04
New member
lol im glad i didnt trade my bender viper for dogpounds slowww srx he said its a 900 but i dont believe that im getting 104 in 1000ft with my viper and 111 with my srx 835
valin
Active member
Get rid of that boost bottle. They will result in power losses. I just proved that on the dyno.
Here's a reference for you. My trail setup 780, which made 181 hp on the dyno at Dynotech runs over 125 mph in 2000' with trail studs and a trail track on ice. I haven't even played with the setup much, and I believe there's a 130 in it with good air.
I am geared for 120 mph at 1:1. My secondary setup is roughly a 42 finish angle with an OEM red secondary spring, wrapped at 60, and I am pulling 8800 rpm with this and approx. 61 grams for weights.
Have you been to the dyno with your motor?
Here's a reference for you. My trail setup 780, which made 181 hp on the dyno at Dynotech runs over 125 mph in 2000' with trail studs and a trail track on ice. I haven't even played with the setup much, and I believe there's a 130 in it with good air.
I am geared for 120 mph at 1:1. My secondary setup is roughly a 42 finish angle with an OEM red secondary spring, wrapped at 60, and I am pulling 8800 rpm with this and approx. 61 grams for weights.
Have you been to the dyno with your motor?
valin said:
That is one strong SRX...what pipes are you using for 8800RPM?
valin
Active member
It should not be peaking at 8800. It should be peaking at 8400-8500. I have an issue between 8000-8600 rpm where the power goes flat, then climbs rapidly from 86-8800, then falls normally. When I get it figured out, it should peak about 6-8 more hp at 8400-8500, according to all the other power curves of motors using these pipes. It's a strange issue.
The pipes are Bender 835 pipes.
The pipes are Bender 835 pipes.