INTRODUCTION Safety The Serpent Viper 990 is designed to be a world champion, while still being easy to use, assemble, and set up. The Serpent Viper 990 offers state of the art specifications and leads the way in chassis design, using all the knowledge we have from 1/8 scale racing into this design too. Continuously pushing the performance envelope, Serpent’s engineers have added new and innovative features that help take your Serpent Viper 990 into the winner’s circle.
how to use the manual lines DESCRIPTION ICONS DESCRIPTION Each step contains a variety of numbers, lines, and symbols. The numbers represent the order in which the parts should be assembled. The lines are described below. Each step contains a variety of symbols described below. 1 2 3 Step number; the order in which you should assemble the indicated parts Carefull, read and check very well. Length after assembly Apply a small amount of cyano glue. Use wear protection for eyes and hands.
REAR assembly STEP 1 bag 1 M3x5 M3x5 M3x5 M3x5 M3x5 4
STEP 2 STEP 3 M4x10 M3x8 1 M3x6 REAR ANTIROLL BAR ROD LENGTH REAR ROLL CENTER INSERTS CHART M4x8 31.
STEP 4 STEP 5 bag 2 M3x8 1 1mm 3 1mm 2 M4x8 4 REAR ROLL CENTER INSERTS CHART M4x8 M4x8 6 M4x8 M3x8
STEP 6 STEP 7 REAR SOLID AXLE EXCENTERS 2.5x22 1 R12 4 M3x10 Note that the rear solid axle excenters are not symmetrical and are market with L (=left) and R (=right). LEFT M3x8 RIGHT 2 REAR BELT TENSION 1 2 Use the central slot as starting position 12x18x4 1 2 12x18x4 R12 3 2.
STEP 8 STEP 9 M3x8 1 5x8x2.5 1 M3x3 2 Do not tighten the M3x3 setscrews until step 10 M3x8 M3x8 8 M3x3 5x8x2.
STEP 10 Fully tighten the M3x3 setscrews after adjusting the rear antiroll bar play to the minimum. M3x10 3 1 2 M3x3 REAR ANTIROLL BAR ASSEMBLY 1 M3x3 5x8x2.
STEP 11 11.1 bag 3 REAR TOE-IN LINK LENGTH 5.5 mm STEP 12 12.1 11.2 12.
STEP 13 REAR reactive steering system Serpent 990 introduce the Active rear toe-in. It brings a new dimension to setup changing the toe-in characteristics of the rear tires under rolling effect. It allows to run less static toe-in and still have a good traction coming out of the corner.
STEP 14 14.1 14.2 rear upper whsibone angle Serpent introduces a new way to adjust the height of the upper pivot on the upright. By changing the excenter, it is possible to move the position up or down by 1.5mm as well as using a “neutral” position. LOWER POSITION MID POSITION UPPER POSITION +1.5 mm -1.5 mm REAR CAMBERLINK LENGTH 1.
STEP 15 15.1 bag 4 15.2 2 12x15x0.25 2.5x12 12x18x4 1 2 12x18x4 1 M3x4 4 3 3x22 15.3 1- Note orientation of the outside wheel axle shim. 2- Note position of the lever spring. M2.5x8 M2.5x8 2.5x12 3x22 12x18x1 Conical 12x15x0.
STEP 16 STEP 17 17.1 bag 5 2 M3x8 R12 17.
STEP 18 18.1 M3x6 18.2 18.3 5x7 1 6x10x3 Flanged 2 4 M3x10 3 1 6x10x3 Flanged After tightening the M3x10 screws check that the brake pads slide easy over the bushings.
gearbox assembly STEP 19 bag 6 19.1 19.2 4 M4x4 M2.5x10 4x4 2 4x4 2.5x10 M2.5x10 1 M4x4 1- The M2.5x10 screws adjust the SHIFT POINT. As default adjustment screw them untill the screws will be be leveled with the hole as in the right pictures. M4x6 3 Note the correct gearbox assembly 2- Adjust the M4x4 screw to minimise the gap between the shoes and the bell, but still spinning free without touching. Check after each run. 2.5x10 16 M4x6 4x4 M4x4 M2.5x10 Note the correct default M2.
STEP 20 20.1 20.
STEP 21 21.1 21.3 M2.5x6 21.2 8x14x4 Flanged 8x14x4 Flanged M3x6 8x11x0.2 R6 M2.5x6 18 M3x6 8x14x4 Flanged R6 8x11x0.
front assembly STEP 22 bag 7 STEP 23 23.1 M2.5x6 23.2 2 1 12x18x4 2 M4x8 12x18x4 M4x8 M4x8 M2.
STEP 24 STEP 25 FRONT BELT TENSION Use the central slot as starting position.
STEP 26 26.1 R6 8x14x4 Flanged 8x14x4 Flanged R6 26.
STEP 27 27.1 bag 8 27.2 Front lower suspension and shock BRACKETS Serpent 990 allows to move front bottom arms 3 mm in (NARROW) and out (WIDE). To maintain the same shock angle, use the suspension bracket and shock bracket as shown here.
STEP 28 28.1 28.3 FRONT DOWN STOPS Front anti-roll bar assembly M3x12 2 M3x3 3 M3x6 1 mm 1 1 28.2 M3x3 5x8x2.5 5x8x2.
STEP 29 bag 9 M4x4 M4x4 M4x8 M4x8 M4x8 24 M4x4
STEP 30 30.1 STEP 31 31.1 30.2 31.2 6X10x3 M3x8 M3x6 M3x6 M3x5 STEERING LINK LENGTH 7.5 mm 6X10x3 Nylock nut M3 SERVOSAVER ACKERMANN INSERTS REARWARD MID FORWARD Preload the servosaver-spring 1mm.
radio assembly STEP 32 bag 10 STEP 33 M3x6 3x7x3 M3x6 M3x8 M3x6 M3x12 radio box assembly M3x5 The small servo mountings have a fixing protrusion which is excentric. Therefore it is possible to assemble them in two different ways in order to adapt the servo mountings to the different servo brands.
STEP 34 STEP 35 M3x10 M2.2x6 Use the 1mm and 2mm spacers to ensure both servos are at the right of the reference line which starts on the carbon plate. M3x10 Note the o-ring position Reference line Note the servo’s wire diagram M3x10 M2.
STEP 36 STEP 37 36.1 36.2 R4 M2x10 5x8x2.5 Flanged M3x5 M3x6 M2x10 28 M3x6 5X8X2.
STEP 38 STEP 39 39.1 Check how many teeth your servo spline has (23, 24 or 25) and use the right lever. throttle LINK LENGTH M3x10 Note correct pivot ball type. 39.2 M3x6 Note orientation of the throttle servo lever.
STEP 40 STEP 41 Check how many teeth your servo spline has (23, 24 or 25) and use the right lever. Note correct pivot ball type. M3x5 Note orientation of the steering servo lever. M3x8 M3x5 30 M3x8 Note the correct position of the grommet.
STEP 42 STEP 43 bag 11 M3x8 Note that middle screw is countersunk and the other two screws are round head.
STEP 44 44.1 STEP 45 M3x6 Use tape to mount the battery to the plastic support. M3x6 M3x8 M3x8 M3x6 M3x6 M3x10 44.2 Use these spacers depending on the type of battery.
FRONT ASEMBLY II STEP 46 bag 12 2 STEP 47 Note that the 4x6x1 and 4x6x0.5 shims must be used always. In order to rise or lower the front suspension bracket it is needed to play with the position of the shims but never remove them. Is it possible to go from “0” with no shims under the bracket to 1.5mm with both shims under the braket. M3x12 1 M3x10 4x6x1 4x6x0.
STEP 48 STEP 49 3x6x1 M3x8 ACKERMANN POSITION FRONT CAMBER AND TRACK WIDTH 1.
STEP 50 50.1 STEERING TRACKROD LENGTH 50.2 41.
STEP 51 51.1 12x18x0.3 bag 13 12x18x4 12x15x0.25 5 pcs 12x18x4 6 1 Note position of the lever spring. 2 4 2.5x12 3 4 5 STEERING BLOCK INSERTS CHART 3x20 M3x4 8 7 TOP 51.2 TRAILING LEADING BOTTOM M2.5x8 3x20 M2.5x8 12x18x0.3 36 12x15x0.25 12x18x4 M3x4 2.
SHOCKS ASSEMBLY STEP 52 shocks bag 52.1 52.2 STEP 53 53.1 Use some silicone oil during the assembly. Insert the o-ring inside the spring collar. rear Nut M2.5 2 For the correct piston holes please check the default setupsheet. front 1 Use the shorter shock shaft in the front and the longer one in the rear shock absorber. rear front 53.2 Note the correct orientation of the shock spacers . Note the correct position of the o-ring . Use some silicone oil during the assembly. rear front Nut M2.
STEP 54 54.1 Push the shock top and the membrane into the shock cap. STEP 55 54.3 1-Bleed: push the shockrod all the way in slowly, to allow excessive oil to escape. Assemble the spring and springcup (align correctly) to complete the shock. 2- Close the shock cap completely. rear 54.2 1- Fill up with sillicone oil fully using the silicone oil supplied in the kit. For the correct cst value please check the default setupsheet. SHOCKS LENGTH: Measure the shock length fully extended.
STEP 56 STEP 57 bag 14 1 M3x6 Nylock nut M4 3 M3x8 2 3 M4x12 FRONT SHOCKS DEFAULT POSITION M3x6 M3x8 M4x8 M4x8 M4x12 Nylock Nut M4 39
STEP 58 STEP 59 Do not overtighten M3x6 Flanged screws. Do not overtighten the M3x10 screws to prevent binding.
STEP 60 M3x4 REAR SHOCKS AND BODYMOUNT DEFAULT POSITION M3x4 M3x6 M3x4 M3x6 41
clutch assembly STEP 61 clutch bag 61.1 STEP 62 62.1 61.2 62.2 1- To align the clutchgears with the 2-speed gears, it may be needed to use shim(s) 6x8x0.5mm (for 6mm shaft) or 7x8x0.5 (for 7mm shaft) behind the cone. This you can see only after assembling the clutch. 2- The holes in the side of the flywheel can be used to block the flywheel (with short allen tool) through the bottom of the chassis, when the engine/clutch is mounted in the car.
STEP 63 63.1 63.2 STEP 64 64.1 Disassemble the clucth bell. IMPORTANT! Install thrust bearing plates as shown. SETTING THE CLUTCH GAP B A Assemble without bearings M3x16 5.2 mm 5.0 mm M3x16 A 63.2 B Clutch gap is calculated taking A and B measurements showed below. GAP = B - A. The advised gap is between 0.6 and 0.8mm Pull the clutch bell forward Push the clutchbell back A 64.2 SETTING THE CLUTCH END PLAY B Place 5x8x0.1 and/or 5x8x0.3 shims to achieve a small amount of end play.
final assembly STEP 65 bag 15 65.1 65.
STEP 66 3 M4x6 M3x6 4 5x8x2.5 Flanged 5x8x2.5 M3x16 M4x6 M3x6 5X8X2.5 Flanged 5x8x2.
STEP 67 3 3 1 1 2 46
STEP 68 68.1 68.2 3 4 STIFFENER LENGTH 13.
STEP 69 69.1 Disassemble the plastic brake lever. 69.3 M3x6 M3x3 M3x6 M3x3 69.2 Pass the brake linkage through the plastic brake lever.
STEP 70 Wheels and tyres are NOT included 49
exploded views index clutch and gearbox exploded view 51 shocks exploded view 52 rr uprights anb fr steering blocks exp.
clutch and gearbox exploded view #903810 Lightweigt 2-speed shaft set S989 110199 903399 6582 903729 903401 903400 6503 1394 903796 opt 909520 opt 903647 110122 903812 110432 1394 903731 903813 903811 110423 903717 909512 opt 6587N 903239 opt 6587XP opt 110424 6584 6583 110423 110107 401131 903643 opt 903644 903645 opt 903799 opt 903800 903801 opt 1377 1388 opt 903636X opt 903637X opt 903638X 110213 909516 Centax clutch shoe XP Centax-2 clutch shoe red Centax gear-pinion alu 23T XLI Ce
shocks exploded view 903720 903741 Shockset XLV short (2) 160139 903742 Shockset XLV long (2) 903744 903788 opt 160320 opt 160321 opt 160322 opt 160323 opt 160324 160325 opt 160326 opt 160327 opt 160328 opt 160329 opt 160330 opt 909405 160146 160141 6442 160140 160147 opt 160138 110437 903745 REAR 903746 FRONT 160300 opt 160301 opt 160302 opt 160303 opt 160304 opt 160305 opt 160306 opt 160307 opt 160308 opt 160309 opt 160310 opt 160311 160147 160300 160301 160302 160303 160304 160305 160306 16030
rr uprights and fr stb.
REAR EXPLODED VIEW 110124 903735 903690 903688 opt 903689 opt 903707 opt 110116 903341 110504 903509 903803 opt 903739 903595 opt 110206 903722 903509 903803 opt 110504 903687 110124 903760 opt 903666 903675 903839 opt 903567 903738 903679 110157 903837 110108 903549 903549 1320 903671 110174 903501 110148 903749 903812 110502 903667 903721 401025 110114 903668 110305 903575 903722 903758 903750 110109 903817 110157 903839 Rearplate flex S990 903840 Weight bridge fr carbon S990 903841 Weig
front 1 exploded view 110112 110116 110112 110108 110108 903691 110116 110109 1311 903343 903681 903829 110306 110402 903794 1394 903505 110109 1394 110116 903341 903754 110112 808214 903574 903650 opt 903509 903804 opt 903505 903594 opt 110504 903795 110306 903721 9212 903651 opt 903509 903804 opt 804117 903231 903665X opt 903556X 903699X opt 903755 110124 110199 9212 903651 opt 110177 903513 110453 110504 903815 903816 903341 903557 903584 opt 903585 opt 903670 110108 41106
radio 1 exploded view 110302 1606 110149 903530 1312 903530 903588 opt 903530 110128 1312 110137 902170 1650 110453 903821 110108 110156 110104 903818 1070 903820 401025 110108 110157 903565 903231 903588 Throttle lever alu 903791 Servo lever 23T alu 903792 Servo lever 24T alu 903793 Servo lever 25T alu 56 903560 903791 opt 903792 opt 903793 opt 110109 903822 110154 1650 903560 110108 110122 110128 110112 903821 1070 804158 110109 903822 804158 1070 903822
RADIO 2 EXPLODED VIEW 903757 1602 110464 902116 1070 902115 110109 110417 903776 110124 903776 110104 903774 110109 110124 903776 600116 600116 600116 903819 903559 110112 57
front 2 exploded view 902157 110122 110122 110104 903784 903740 903823 1321 902134 411207 110118 902138 411207 110118 110157 110402 902139 902135 110118 903508 903516 808214 903563 903612 opt 808214 903508 110459 903830 110112 110109 110101 58 903231 902128 411206 1321 903782 110461 804470 110101 110101 903589 Servosaver bottom alu (2) 903612 Wishbone FR up (2) hard 401025 903790 903589 opt 903568 110124 903568 110108 903589 opt 903568
Bumper and bodymount exploded view 903502 110403 903706 903379 903663 opt 903724 opt 1650 903538 903741 903521 110115 903719 903536 110109 110108 110124 110137 909345 110109 110113 903741 110172 903718 1650 903537 903619 909345 110108 110105 110109 903835 110108 1650 903742 903663 Bumper 1/8 FLOW 903664 Bumper insert set (2+2) FLOW 903724 Bumper light S989 59
FINAL EXPLODED VIEW 1494 110178 110132 110178 903723 903834 903231 903692 902138 411206 1311 1312 901255 110108 903692 903535 1639 804181 1639 901255 903549 401125 110124 903748 110108 110169 60 110417 903299 110119 804399
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Manual Viper 990 # 57677-1
