VintageVmax.com

This 83 I have wants to lay down at about 60 mph or quit pulling.From idle to 60+ it pulls very hard till it hits 60 mph. Any idea's ?? Thx

Unles something sounds ugly in the engine, I would look at clutching first.
Does it pull cleanly up to shift out speed, What is that rpm?

Bob Vehring wrote:Unles something sounds ugly in the engine, I would look at clutching first.
Does it pull cleanly up to shift out speed, What is that rpm?

x2 !
Belt wear, C to C, offset, clutches in good condition and clean ?

http://www.vintagevmax.com/1986_service.htm
Drive- Engagement rpm/ Shift rpm 4000 +/- 200 rpm/ 8200 +/-200rpm
Belt Length/ Width/ Wear Limit/ IBM Number 1175mm/ 31.6mm/ 26mm/ 8M6
Sheave Center to Center/ Offset 305 +/-1.0mm/ 11 +/-0.5mm
Primary Spring Color/ Length/ Rate/ Preload Pink/ 75.5mm/ 2.31Kg-mm/ 32.8 Kg
Secondary Spring Preload/ Color/ Length 40� (C-2)/ Pink/ NA
Secondary Drive Ratio/ Chain Free play 18-33/ 10 +5 -2 mm
Track Width/ Tension 15 in/ 25~30 mm @ 10 Kg (1.0~1.2 in @ 22lbs)

Belt does have alot of wear on it.You can see a little steel on top showing thru(lol).Tach is at about 6,500-7,000 at 60 mph.Clutch does engage at 4,000.Has a factory comet and looks to in very nice shape..thx

Looks can be decieving. I found the bushing in the arms worn out in my SRV a week ago, one arm was not really moving out.. If ot doesn't reach its full shift out RPM. it isn't going to be making power. check both clutches over carefully

Guess you guys were right about checking over the clutchs very carefully.I'll be dam,looked at them like 5 times and never seen nothing wrong.Untill this morning,found the primary clutch spring broke.What color spring should I replace it with(pink)?
Thx !!

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